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comedi/drivers/das16cs.c
Driver for Computer Boards PC-CARD DAS16/16.
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000, 2001, 2002 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: cb_das16_cs
Description: Computer Boards PC-CARD DAS16/16
Devices: [ComputerBoards] PC-CARD DAS16/16 (cb_das16_cs), PC-CARD DAS16/16-AO
Author: ds
Updated: Mon, 04 Nov 2002 20:04:21 -0800
Status: experimental
*/
#include <linux/interrupt.h>
#include <linux/slab.h>
#include "../comedidev.h"
#include <linux/delay.h>
#include <linux/pci.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include "8253.h"
#define DAS16CS_SIZE 18
#define DAS16CS_ADC_DATA 0
#define DAS16CS_DIO_MUX 2
#define DAS16CS_MISC1 4
#define DAS16CS_MISC2 6
#define DAS16CS_CTR0 8
#define DAS16CS_CTR1 10
#define DAS16CS_CTR2 12
#define DAS16CS_CTR_CONTROL 14
#define DAS16CS_DIO 16
struct das16cs_board {
const char *name;
int device_id;
int n_ao_chans;
};
static const struct das16cs_board das16cs_boards[] = {
{
.device_id = 0x0000, /* unknown */
.name = "PC-CARD DAS16/16",
.n_ao_chans = 0,
},
{
.device_id = 0x0039,
.name = "PC-CARD DAS16/16-AO",
.n_ao_chans = 2,
},
{
.device_id = 0x4009,
.name = "PCM-DAS16s/16",
.n_ao_chans = 0,
},
};
#define n_boards ARRAY_SIZE(das16cs_boards)
#define thisboard ((const struct das16cs_board *)dev->board_ptr)
struct das16cs_private {
struct pcmcia_device *link;
unsigned int ao_readback[2];
unsigned short status1;
unsigned short status2;
};
#define devpriv ((struct das16cs_private *)dev->private)
static int das16cs_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static int das16cs_detach(struct comedi_device *dev);
static struct comedi_driver driver_das16cs = {
.driver_name = "cb_das16_cs",
.module = THIS_MODULE,
.attach = das16cs_attach,
.detach = das16cs_detach,
};
static struct pcmcia_device *cur_dev = NULL;
static const struct comedi_lrange das16cs_ai_range = { 4, {
RANGE(-10, 10),
RANGE(-5, 5),
RANGE(-2.5, 2.5),
RANGE(-1.25, 1.25),
}
};
static irqreturn_t das16cs_interrupt(int irq, void *d);
static int das16cs_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int das16cs_ai_cmd(struct comedi_device *dev,
struct comedi_subdevice *s);
static int das16cs_ai_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd);
static int das16cs_ao_winsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int das16cs_ao_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int das16cs_dio_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int das16cs_dio_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data);
static int das16cs_timer_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data);
static int das16cs_timer_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data);
static const struct das16cs_board *das16cs_probe(struct comedi_device *dev,
struct pcmcia_device *link)
{
int i;
for (i = 0; i < n_boards; i++) {
if (das16cs_boards[i].device_id == link->card_id)
return das16cs_boards + i;
}
printk("unknown board!\n");
return NULL;
}
static int das16cs_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct pcmcia_device *link;
struct comedi_subdevice *s;
int ret;
int i;
printk("comedi%d: cb_das16_cs: ", dev->minor);
link = cur_dev; /* XXX hack */
if (!link)
return -EIO;
dev->iobase = link->resource[0]->start;
printk("I/O base=0x%04lx ", dev->iobase);
printk("fingerprint:\n");
for (i = 0; i < 48; i += 2)
printk("%04x ", inw(dev->iobase + i));
printk("\n");
ret = request_irq(link->irq, das16cs_interrupt,
IRQF_SHARED, "cb_das16_cs", dev);
if (ret < 0)
return ret;
dev->irq = link->irq;
printk("irq=%u ", dev->irq);
dev->board_ptr = das16cs_probe(dev, link);
if (!dev->board_ptr)
return -EIO;
dev->board_name = thisboard->name;
if (alloc_private(dev, sizeof(struct das16cs_private)) < 0)
return -ENOMEM;
if (alloc_subdevices(dev, 4) < 0)
return -ENOMEM;
s = dev->subdevices + 0;
dev->read_subdev = s;
/* analog input subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ;
s->n_chan = 16;
s->maxdata = 0xffff;
s->range_table = &das16cs_ai_range;
s->len_chanlist = 16;
s->insn_read = das16cs_ai_rinsn;
s->do_cmd = das16cs_ai_cmd;
s->do_cmdtest = das16cs_ai_cmdtest;
s = dev->subdevices + 1;
/* analog output subdevice */
if (thisboard->n_ao_chans) {
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = thisboard->n_ao_chans;
s->maxdata = 0xffff;
s->range_table = &range_bipolar10;
s->insn_write = &das16cs_ao_winsn;
s->insn_read = &das16cs_ao_rinsn;
}
s = dev->subdevices + 2;
/* digital i/o subdevice */
if (1) {
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = das16cs_dio_insn_bits;
s->insn_config = das16cs_dio_insn_config;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
s = dev->subdevices + 3;
/* timer subdevice */
if (0) {
s->type = COMEDI_SUBD_TIMER;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = 1;
s->maxdata = 0xff;
s->range_table = &range_unknown;
s->insn_read = das16cs_timer_insn_read;
s->insn_config = das16cs_timer_insn_config;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
printk("attached\n");
return 1;
}
static int das16cs_detach(struct comedi_device *dev)
{
printk("comedi%d: das16cs: remove\n", dev->minor);
if (dev->irq)
free_irq(dev->irq, dev);
return 0;
}
static irqreturn_t das16cs_interrupt(int irq, void *d)
{
/* struct comedi_device *dev = d; */
return IRQ_HANDLED;
}
/*
* "instructions" read/write data in "one-shot" or "software-triggered"
* mode.
*/
static int das16cs_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int to;
int aref;
int range;
int chan;
static int range_bits[] = { 0x800, 0x000, 0x100, 0x200 };
chan = CR_CHAN(insn->chanspec);
aref = CR_AREF(insn->chanspec);
range = CR_RANGE(insn->chanspec);
outw(chan, dev->iobase + 2);
devpriv->status1 &= ~0xf320;
devpriv->status1 |= (aref == AREF_DIFF) ? 0 : 0x0020;
outw(devpriv->status1, dev->iobase + 4);
devpriv->status2 &= ~0xff00;
devpriv->status2 |= range_bits[range];
outw(devpriv->status2, dev->iobase + 6);
for (i = 0; i < insn->n; i++) {
outw(0, dev->iobase);
#define TIMEOUT 1000
for (to = 0; to < TIMEOUT; to++) {
if (inw(dev->iobase + 4) & 0x0080)
break;
}
if (to == TIMEOUT) {
printk("cb_das16_cs: ai timeout\n");
return -ETIME;
}
data[i] = (unsigned short)inw(dev->iobase + 0);
}
return i;
}
static int das16cs_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
return -EINVAL;
}
static int das16cs_ai_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
int err = 0;
int tmp;
/* cmdtest tests a particular command to see if it is valid.
* Using the cmdtest ioctl, a user can create a valid cmd
* and then have it executes by the cmd ioctl.
*
* cmdtest returns 1,2,3,4 or 0, depending on which tests
* the command passes. */
/* step 1: make sure trigger sources are trivially valid */
tmp = cmd->start_src;
cmd->start_src &= TRIG_NOW;
if (!cmd->start_src || tmp != cmd->start_src)
err++;
tmp = cmd->scan_begin_src;
cmd->scan_begin_src &= TRIG_TIMER | TRIG_EXT;
if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
err++;
tmp = cmd->convert_src;
cmd->convert_src &= TRIG_TIMER | TRIG_EXT;
if (!cmd->convert_src || tmp != cmd->convert_src)
err++;
tmp = cmd->scan_end_src;
cmd->scan_end_src &= TRIG_COUNT;
if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
err++;
tmp = cmd->stop_src;
cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
if (!cmd->stop_src || tmp != cmd->stop_src)
err++;
if (err)
return 1;
/* step 2: make sure trigger sources are unique and mutually compatible */
/* note that mutual compatibility is not an issue here */
if (cmd->scan_begin_src != TRIG_TIMER &&
cmd->scan_begin_src != TRIG_EXT)
err++;
if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
err++;
if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
err++;
if (err)
return 2;
/* step 3: make sure arguments are trivially compatible */
if (cmd->start_arg != 0) {
cmd->start_arg = 0;
err++;
}
#define MAX_SPEED 10000 /* in nanoseconds */
#define MIN_SPEED 1000000000 /* in nanoseconds */
if (cmd->scan_begin_src == TRIG_TIMER) {
if (cmd->scan_begin_arg < MAX_SPEED) {
cmd->scan_begin_arg = MAX_SPEED;
err++;
}
if (cmd->scan_begin_arg > MIN_SPEED) {
cmd->scan_begin_arg = MIN_SPEED;
err++;
}
} else {
/* external trigger */
/* should be level/edge, hi/lo specification here */
/* should specify multiple external triggers */
if (cmd->scan_begin_arg > 9) {
cmd->scan_begin_arg = 9;
err++;
}
}
if (cmd->convert_src == TRIG_TIMER) {
if (cmd->convert_arg < MAX_SPEED) {
cmd->convert_arg = MAX_SPEED;
err++;
}
if (cmd->convert_arg > MIN_SPEED) {
cmd->convert_arg = MIN_SPEED;
err++;
}
} else {
/* external trigger */
/* see above */
if (cmd->convert_arg > 9) {
cmd->convert_arg = 9;
err++;
}
}
if (cmd->scan_end_arg != cmd->chanlist_len) {
cmd->scan_end_arg = cmd->chanlist_len;
err++;
}
if (cmd->stop_src == TRIG_COUNT) {
if (cmd->stop_arg > 0x00ffffff) {
cmd->stop_arg = 0x00ffffff;
err++;
}
} else {
/* TRIG_NONE */
if (cmd->stop_arg != 0) {
cmd->stop_arg = 0;
err++;
}
}
if (err)
return 3;
/* step 4: fix up any arguments */
if (cmd->scan_begin_src == TRIG_TIMER) {
unsigned int div1 = 0, div2 = 0;
tmp = cmd->scan_begin_arg;
i8253_cascade_ns_to_timer(100, &div1, &div2,
&cmd->scan_begin_arg,
cmd->flags & TRIG_ROUND_MASK);
if (tmp != cmd->scan_begin_arg)
err++;
}
if (cmd->convert_src == TRIG_TIMER) {
unsigned int div1 = 0, div2 = 0;
tmp = cmd->convert_arg;
i8253_cascade_ns_to_timer(100, &div1, &div2,
&cmd->scan_begin_arg,
cmd->flags & TRIG_ROUND_MASK);
if (tmp != cmd->convert_arg)
err++;
if (cmd->scan_begin_src == TRIG_TIMER &&
cmd->scan_begin_arg <
cmd->convert_arg * cmd->scan_end_arg) {
cmd->scan_begin_arg =
cmd->convert_arg * cmd->scan_end_arg;
err++;
}
}
if (err)
return 4;
return 0;
}
static int das16cs_ao_winsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
unsigned short status1;
unsigned short d;
int bit;
for (i = 0; i < insn->n; i++) {
devpriv->ao_readback[chan] = data[i];
d = data[i];
outw(devpriv->status1, dev->iobase + 4);
udelay(1);
status1 = devpriv->status1 & ~0xf;
if (chan)
status1 |= 0x0001;
else
status1 |= 0x0008;
/* printk("0x%04x\n",status1);*/
outw(status1, dev->iobase + 4);
udelay(1);
for (bit = 15; bit >= 0; bit--) {
int b = (d >> bit) & 0x1;
b <<= 1;
/* printk("0x%04x\n",status1 | b | 0x0000);*/
outw(status1 | b | 0x0000, dev->iobase + 4);
udelay(1);
/* printk("0x%04x\n",status1 | b | 0x0004);*/
outw(status1 | b | 0x0004, dev->iobase + 4);
udelay(1);
}
/* make high both DAC0CS and DAC1CS to load
new data and update analog output*/
outw(status1 | 0x9, dev->iobase + 4);
}
return i;
}
/* AO subdevices should have a read insn as well as a write insn.
* Usually this means copying a value stored in devpriv. */
static int das16cs_ao_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
for (i = 0; i < insn->n; i++)
data[i] = devpriv->ao_readback[chan];
return i;
}
/* DIO devices are slightly special. Although it is possible to
* implement the insn_read/insn_write interface, it is much more
* useful to applications if you implement the insn_bits interface.
* This allows packed reading/writing of the DIO channels. The
* comedi core can convert between insn_bits and insn_read/write */
static int das16cs_dio_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
if (data[0]) {
s->state &= ~data[0];
s->state |= data[0] & data[1];
outw(s->state, dev->iobase + 16);
}
/* on return, data[1] contains the value of the digital
* input and output lines. */
data[1] = inw(dev->iobase + 16);
return 2;
}
static int das16cs_dio_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
int bits;
if (chan < 4)
bits = 0x0f;
else
bits = 0xf0;
switch (data[0]) {
case INSN_CONFIG_DIO_OUTPUT:
s->io_bits |= bits;
break;
case INSN_CONFIG_DIO_INPUT:
s->io_bits &= bits;
break;
case INSN_CONFIG_DIO_QUERY:
data[1] =
(s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
return insn->n;
break;
default:
return -EINVAL;
break;
}
devpriv->status2 &= ~0x00c0;
devpriv->status2 |= (s->io_bits & 0xf0) ? 0x0080 : 0;
devpriv->status2 |= (s->io_bits & 0x0f) ? 0x0040 : 0;
outw(devpriv->status2, dev->iobase + 6);
return insn->n;
}
static int das16cs_timer_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
return -EINVAL;
}
static int das16cs_timer_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
return -EINVAL;
}
/* PCMCIA stuff */
/*======================================================================
The following pcmcia code for the pcm-das08 is adapted from the
dummy_cs.c driver of the Linux PCMCIA Card Services package.
The initial developer of the original code is David A. Hinds
<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
======================================================================*/
#if defined(CONFIG_PCMCIA) || defined(CONFIG_PCMCIA_MODULE)
static void das16cs_pcmcia_config(struct pcmcia_device *link);
static void das16cs_pcmcia_release(struct pcmcia_device *link);
static int das16cs_pcmcia_suspend(struct pcmcia_device *p_dev);
static int das16cs_pcmcia_resume(struct pcmcia_device *p_dev);
/*
The attach() and detach() entry points are used to create and destroy
"instances" of the driver, where each instance represents everything
needed to manage one actual PCMCIA card.
*/
static int das16cs_pcmcia_attach(struct pcmcia_device *);
static void das16cs_pcmcia_detach(struct pcmcia_device *);
/*
You'll also need to prototype all the functions that will actually
be used to talk to your device. See 'memory_cs' for a good example
of a fully self-sufficient driver; the other drivers rely more or
less on other parts of the kernel.
*/
struct local_info_t {
struct pcmcia_device *link;
int stop;
struct bus_operations *bus;
};
/*======================================================================
das16cs_pcmcia_attach() creates an "instance" of the driver, allocating
local data structures for one device. The device is registered
with Card Services.
The dev_link structure is initialized, but we don't actually
configure the card at this point -- we wait until we receive a
card insertion event.
======================================================================*/
static int das16cs_pcmcia_attach(struct pcmcia_device *link)
{
struct local_info_t *local;
dev_dbg(&link->dev, "das16cs_pcmcia_attach()\n");
/* Allocate space for private device-specific data */
local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
if (!local)
return -ENOMEM;
local->link = link;
link->priv = local;
cur_dev = link;
das16cs_pcmcia_config(link);
return 0;
} /* das16cs_pcmcia_attach */
static void das16cs_pcmcia_detach(struct pcmcia_device *link)
{
dev_dbg(&link->dev, "das16cs_pcmcia_detach\n");
((struct local_info_t *)link->priv)->stop = 1;
das16cs_pcmcia_release(link);
/* This points to the parent struct local_info_t struct */
kfree(link->priv);
} /* das16cs_pcmcia_detach */
static int das16cs_pcmcia_config_loop(struct pcmcia_device *p_dev,
void *priv_data)
{
if (p_dev->config_index == 0)
return -EINVAL;
return pcmcia_request_io(p_dev);
}
static void das16cs_pcmcia_config(struct pcmcia_device *link)
{
int ret;
dev_dbg(&link->dev, "das16cs_pcmcia_config\n");
/* Do we need to allocate an interrupt? */
link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
ret = pcmcia_loop_config(link, das16cs_pcmcia_config_loop, NULL);
if (ret) {
dev_warn(&link->dev, "no configuration found\n");
goto failed;
}
if (!link->irq)
goto failed;
ret = pcmcia_enable_device(link);
if (ret)
goto failed;
return;
failed:
das16cs_pcmcia_release(link);
} /* das16cs_pcmcia_config */
static void das16cs_pcmcia_release(struct pcmcia_device *link)
{
dev_dbg(&link->dev, "das16cs_pcmcia_release\n");
pcmcia_disable_device(link);
} /* das16cs_pcmcia_release */
static int das16cs_pcmcia_suspend(struct pcmcia_device *link)
{
struct local_info_t *local = link->priv;
/* Mark the device as stopped, to block IO until later */
local->stop = 1;
return 0;
} /* das16cs_pcmcia_suspend */
static int das16cs_pcmcia_resume(struct pcmcia_device *link)
{
struct local_info_t *local = link->priv;
local->stop = 0;
return 0;
} /* das16cs_pcmcia_resume */
/*====================================================================*/
static const struct pcmcia_device_id das16cs_id_table[] = {
PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x0039),
PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4009),
PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, das16cs_id_table);
MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
MODULE_LICENSE("GPL");
struct pcmcia_driver das16cs_driver = {
.probe = das16cs_pcmcia_attach,
.remove = das16cs_pcmcia_detach,
.suspend = das16cs_pcmcia_suspend,
.resume = das16cs_pcmcia_resume,
.id_table = das16cs_id_table,
.owner = THIS_MODULE,
.name = "cb_das16_cs",
};
static int __init init_das16cs_pcmcia_cs(void)
{
pcmcia_register_driver(&das16cs_driver);
return 0;
}
static void __exit exit_das16cs_pcmcia_cs(void)
{
pr_debug("das16cs_pcmcia_cs: unloading\n");
pcmcia_unregister_driver(&das16cs_driver);
}
int __init init_module(void)
{
int ret;
ret = init_das16cs_pcmcia_cs();
if (ret < 0)
return ret;
return comedi_driver_register(&driver_das16cs);
}
void __exit cleanup_module(void)
{
exit_das16cs_pcmcia_cs();
comedi_driver_unregister(&driver_das16cs);
}
#else
static int __init driver_das16cs_init_module(void)
{
return comedi_driver_register(&driver_das16cs);
}
static void __exit driver_das16cs_cleanup_module(void)
{
comedi_driver_unregister(&driver_das16cs);
}
module_init(driver_das16cs_init_module);
module_exit(driver_das16cs_cleanup_module);
#endif /* CONFIG_PCMCIA */
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