// SPDX-License-Identifier: GPL-2.0+
/*
* cb_das16_cs.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>
*
* PCMCIA support code for this driver 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.
*/
/*
* 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/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include "../comedi_pcmcia.h"
#include "comedi_8254.h"
/*
* Register I/O map
*/
#define DAS16CS_AI_DATA_REG 0x00
#define DAS16CS_AI_MUX_REG 0x02
#define DAS16CS_AI_MUX_HI_CHAN(x) (((x) & 0xf) << 4)
#define DAS16CS_AI_MUX_LO_CHAN(x) (((x) & 0xf) << 0)
#define DAS16CS_AI_MUX_SINGLE_CHAN(x) (DAS16CS_AI_MUX_HI_CHAN(x) | \
DAS16CS_AI_MUX_LO_CHAN(x))
#define DAS16CS_MISC1_REG 0x04
#define DAS16CS_MISC1_INTE BIT(15) /* 1=enable; 0=disable */
#define DAS16CS_MISC1_INT_SRC(x) (((x) & 0x7) << 12) /* interrupt src */
#define DAS16CS_MISC1_INT_SRC_NONE DAS16CS_MISC1_INT_SRC(0)
#define DAS16CS_MISC1_INT_SRC_PACER DAS16CS_MISC1_INT_SRC(1)
#define DAS16CS_MISC1_INT_SRC_EXT DAS16CS_MISC1_INT_SRC(2)
#define DAS16CS_MISC1_INT_SRC_FNE DAS16CS_MISC1_INT_SRC(3)
#define DAS16CS_MISC1_INT_SRC_FHF DAS16CS_MISC1_INT_SRC(4)
#define DAS16CS_MISC1_INT_SRC_EOS DAS16CS_MISC1_INT_SRC(5)
#define DAS16CS_MISC1_INT_SRC_MASK DAS16CS_MISC1_INT_SRC(7)
#define DAS16CS_MISC1_OVR BIT(10) /* ro - 1=FIFO overflow */
#define DAS16CS_MISC1_AI_CONV(x) (((x) & 0x3) << 8) /* AI convert src */
#define DAS16CS_MISC1_AI_CONV_SW DAS16CS_MISC1_AI_CONV(0)
#define DAS16CS_MISC1_AI_CONV_EXT_NEG DAS16CS_MISC1_AI_CONV(1)
#define DAS16CS_MISC1_AI_CONV_EXT_POS DAS16CS_MISC1_AI_CONV(2)
#define DAS16CS_MISC1_AI_CONV_PACER DAS16CS_MISC1_AI_CONV(3)
#define DAS16CS_MISC1_AI_CONV_MASK DAS16CS_MISC1_AI_CONV(3)
#define DAS16CS_MISC1_EOC BIT(7) /* ro - 0=busy; 1=ready */
#define DAS16CS_MISC1_SEDIFF BIT(5) /* 0=diff; 1=se */
#define DAS16CS_MISC1_INTB BIT(4) /* ro - 0=latched; 1=cleared */
#define DAS16CS_MISC1_MA_MASK (0xf << 0) /* ro - current ai mux */
#define DAS16CS_MISC1_DAC1CS BIT(3) /* wo - DAC1 chip select */
#define DAS16CS_MISC1_DACCLK BIT(2) /* wo - Serial DAC clock */
#define DAS16CS_MISC1_DACSD BIT(1) /* wo - Serial DAC data */
#define DAS16CS_MISC1_DAC0CS BIT(0) /* wo - DAC0 chip select */
#define DAS16CS_MISC1_DAC_MASK (0x0f << 0)
#define DAS16CS_MISC2_REG 0x06
#define DAS16CS_MISC2_BME BIT(14) /* 1=burst enable; 0=disable */
#define DAS16CS_MISC2_AI_GAIN(x) (((x) & 0xf) << 8) /* AI gain */
#define DAS16CS_MISC2_AI_GAIN_1 DAS16CS_MISC2_AI_GAIN(4) /* +/-10V */
#define DAS16CS_MISC2_AI_GAIN_2 DAS16CS_MISC2_AI_GAIN(0) /* +/-5V */
#define DAS16CS_MISC2_AI_GAIN_4 DAS16CS_MISC2_AI_GAIN(1) /* +/-2.5V */
#define DAS16CS_MISC2_AI_GAIN_8 DAS16CS_MISC2_AI_GAIN(2) /* +-1.25V */
#define DAS16CS_MISC2_AI_GAIN_MASK DAS16CS_MISC2_AI_GAIN(0xf)
#define DAS16CS_MISC2_UDIR BIT(7) /* 1=dio7:4 output; 0=input */
#define DAS16CS_MISC2_LDIR BIT(6) /* 1=dio3:0 output; 0=input */
#define DAS16CS_MISC2_TRGPOL BIT(5) /* 1=active lo; 0=hi */
#define DAS16CS_MISC2_TRGSEL BIT(4) /* 1=edge; 0=level */
#define DAS16CS_MISC2_FFNE BIT(3) /* ro - 1=FIFO not empty */
#define DAS16CS_MISC2_TRGCLR BIT(3) /* wo - 1=clr (monstable) */
#define DAS16CS_MISC2_CLK2 BIT(2) /* 1=10 MHz; 0=1 MHz */
#define DAS16CS_MISC2_CTR1 BIT(1) /* 1=int. 100 kHz; 0=ext. clk */
#define DAS16CS_MISC2_TRG0 BIT(0) /* 1=enable; 0=disable */
#define DAS16CS_TIMER_BASE 0x08
#define DAS16CS_DIO_REG 0x10
struct das16cs_board {
const char *name;
int device_id;
unsigned int has_ao:1;
unsigned int has_4dio:1;
};
static const struct das16cs_board das16cs_boards[] = {
{
.name = "PC-CARD DAS16/16-AO",
.device_id = 0x0039,
.has_ao = 1,
.has_4dio = 1,
}, {
.name = "PCM-DAS16s/16",
.device_id = 0x4009,
}, {
.name = "PC-CARD DAS16/16",
.device_id = 0x0000, /* unknown */
},
};
struct das16cs_private {
unsigned short misc1;
unsigned short misc2;
};
static const struct comedi_lrange das16cs_ai_range = {
4, {
BIP_RANGE(10),
BIP_RANGE(5),
BIP_RANGE(2.5),
BIP_RANGE(1.25),
}
};
static int das16cs_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inw(dev->iobase + DAS16CS_MISC1_REG);
if (status & DAS16CS_MISC1_EOC)
return 0;
return -EBUSY;
}
static int das16cs_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct das16cs_private *devpriv = dev->private;
int chan = CR_CHAN(insn->chanspec);
int range = CR_RANGE(insn->chanspec);
int aref = CR_AREF(insn->chanspec);
int ret;
int i;
outw(DAS16CS_AI_MUX_SINGLE_CHAN(chan),
dev->iobase + DAS16CS_AI_MUX_REG);
/* disable interrupts, software convert */
devpriv->misc1 &= ~(DAS16CS_MISC1_INTE | DAS16CS_MISC1_INT_SRC_MASK |
DAS16CS_MISC1_AI_CONV_MASK);
if (aref == AREF_DIFF)
devpriv->misc1 &= ~DAS16CS_MISC1_SEDIFF;
else
devpriv->misc1 |= DAS16CS_MISC1_SEDIFF;
outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
devpriv->misc2 &= ~(DAS16CS_MISC2_BME | DAS16CS_MISC2_AI_GAIN_MASK);
switch (range) {
case 0:
devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_1;
break;
case 1:
devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_2;
break;
case 2:
devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_4;
break;
case 3:
devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_8;
break;
}
outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
for (i = 0; i < insn->n; i++) {
outw(0, dev->iobase + DAS16CS_AI_DATA_REG);
ret = comedi_timeout(dev, s, insn, das16cs_ai_eoc, 0);
if (ret)
return ret;
data[i] = inw(dev->iobase + DAS16CS_AI_DATA_REG);
}
return i;
}
static int das16cs_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct das16cs_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
unsigned short misc1;
int bit;
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
udelay(1);
/* raise the DACxCS line for the non-selected channel */
misc1 = devpriv->misc1 & ~DAS16CS_MISC1_DAC_MASK;
if (chan)
misc1 |= DAS16CS_MISC1_DAC0CS;
else
misc1 |= DAS16CS_MISC1_DAC1CS;
outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
udelay(1);
for (bit = 15; bit >= 0; bit--) {
if ((val >> bit) & 0x1)
misc1 |= DAS16CS_MISC1_DACSD;
else
misc1 &= ~DAS16CS_MISC1_DACSD;
outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
udelay(1);
outw(misc1 | DAS16CS_MISC1_DACCLK,
dev->iobase + DAS16CS_MISC1_REG);
udelay(1);
}
/*
* Make both DAC0CS and DAC1CS high to load
* the new data and update analog the output
*/
outw(misc1 | DAS16CS_MISC1_DAC0CS | DAS16CS_MISC1_DAC1CS,
dev->iobase + DAS16CS_MISC1_REG);
}
s->readback[chan] = val;
return insn->n;
}
static int das16cs_dio_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
if (comedi_dio_update_state(s, data))
outw(s->state, dev->iobase + DAS16CS_DIO_REG);
data[1] = inw(dev->iobase + DAS16CS_DIO_REG);
return insn->n;
}
static int das16cs_dio_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct das16cs_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int mask;
int ret;
if (chan < 4)
mask = 0x0f;
else
mask = 0xf0;
ret = comedi_dio_insn_config(dev, s, insn, data, mask);
if (ret)
return ret;
if (s->io_bits & 0xf0)
devpriv->misc2 |= DAS16CS_MISC2_UDIR;
else
devpriv->misc2 &= ~DAS16CS_MISC2_UDIR;
if (s->io_bits & 0x0f)
devpriv->misc2 |= DAS16CS_MISC2_LDIR;
else
devpriv->misc2 &= ~DAS16CS_MISC2_LDIR;
outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
return insn->n;
}
static int das16cs_counter_insn_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct das16cs_private *devpriv = dev->private;
switch (data[0]) {
case INSN_CONFIG_SET_CLOCK_SRC:
switch (data[1]) {
case 0: /* internal 100 kHz */
devpriv->misc2 |= DAS16CS_MISC2_CTR1;
break;
case 1: /* external */
devpriv->misc2 &= ~DAS16CS_MISC2_CTR1;
break;
default:
return -EINVAL;
}
outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
break;
case INSN_CONFIG_GET_CLOCK_SRC:
if (devpriv->misc2 & DAS16CS_MISC2_CTR1) {
data[1] = 0;
data[2] = I8254_OSC_BASE_100KHZ;
} else {
data[1] = 1;
data[2] = 0; /* unknown */
}
break;
default:
return -EINVAL;
}
return insn->n;
}
static const void *das16cs_find_boardinfo(struct comedi_device *dev,
struct pcmcia_device *link)
{
const struct das16cs_board *board;
int i;
for (i = 0; i < ARRAY_SIZE(das16cs_boards); i++) {
board = &das16cs_boards[i];
if (board->device_id == link->card_id)
return board;
}
return NULL;
}
static int das16cs_auto_attach(struct comedi_device *dev,
unsigned long context)
{
struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
const struct das16cs_board *board;
struct das16cs_private *devpriv;
struct comedi_subdevice *s;
int ret;
board = das16cs_find_boardinfo(dev, link);
if (!board)
return -ENODEV;
dev->board_ptr = board;
dev->board_name = board->name;
link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
ret = comedi_pcmcia_enable(dev, NULL);
if (ret)
return ret;
dev->iobase = link->resource[0]->start;
link->priv = dev;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
dev->pacer = comedi_8254_init(dev->iobase + DAS16CS_TIMER_BASE,
I8254_OSC_BASE_10MHZ, I8254_IO16, 0);
if (!dev->pacer)
return -ENOMEM;
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
/* Analog Input subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
s->n_chan = 16;
s->maxdata = 0xffff;
s->range_table = &das16cs_ai_range;
s->insn_read = das16cs_ai_insn_read;
/* Analog Output subdevice */
s = &dev->subdevices[1];
if (board->has_ao) {
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0xffff;
s->range_table = &range_bipolar10;
s->insn_write = &das16cs_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
/* Digital I/O subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = board->has_4dio ? 4 : 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = das16cs_dio_insn_bits;
s->insn_config = das16cs_dio_insn_config;
/* Counter subdevice (8254) */
s = &dev->subdevices[3];
comedi_8254_subdevice_init(s, dev->pacer);
dev->pacer->insn_config = das16cs_counter_insn_config;
/* counters 1 and 2 are used internally for the pacer */
comedi_8254_set_busy(dev->pacer, 1, true);
comedi_8254_set_busy(dev->pacer, 2, true);
return 0;
}
static struct comedi_driver driver_das16cs = {
.driver_name = "cb_das16_cs",
.module = THIS_MODULE,
.auto_attach = das16cs_auto_attach,
.detach = comedi_pcmcia_disable,
};
static int das16cs_pcmcia_attach(struct pcmcia_device *link)
{
return comedi_pcmcia_auto_config(link, &driver_das16cs);
}
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);
static struct pcmcia_driver das16cs_driver = {
.name = "cb_das16_cs",
.owner = THIS_MODULE,
.id_table = das16cs_id_table,
.probe = das16cs_pcmcia_attach,
.remove = comedi_pcmcia_auto_unconfig,
};
module_comedi_pcmcia_driver(driver_das16cs, das16cs_driver);
MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
MODULE_LICENSE("GPL");