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/*
* comedi/drivers/mf6x4.c
* Driver for Humusoft MF634 and MF624 Data acquisition cards
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 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.
*/
/*
* Driver: mf6x4
* Description: Humusoft MF634 and MF624 Data acquisition card driver
* Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
* Author: Rostislav Lisovy <lisovy@gmail.com>
* Status: works
* Updated:
* Configuration Options: none
*/
#include <linux/module.h>
#include <linux/delay.h>
#include "../comedi_pci.h"
/* Registers present in BAR0 memory region */
#define MF624_GPIOC_REG 0x54
#define MF6X4_GPIOC_EOLC BIT(17) /* End Of Last Conversion */
#define MF6X4_GPIOC_LDAC BIT(23) /* Load DACs */
#define MF6X4_GPIOC_DACEN BIT(26)
/* BAR1 registers */
#define MF6X4_ADDATA_REG 0x00
#define MF6X4_ADCTRL_REG 0x00
#define MF6X4_ADCTRL_CHAN(x) BIT(chan)
#define MF6X4_DIN_REG 0x10
#define MF6X4_DIN_MASK 0xff
#define MF6X4_DOUT_REG 0x10
#define MF6X4_ADSTART_REG 0x20
#define MF6X4_DAC_REG(x) (0x20 + ((x) * 2))
/* BAR2 registers */
#define MF634_GPIOC_REG 0x68
enum mf6x4_boardid {
BOARD_MF634,
BOARD_MF624,
};
struct mf6x4_board {
const char *name;
/* We need to keep track of the order of BARs used by the cards */
unsigned int bar_nums[3];
};
static const struct mf6x4_board mf6x4_boards[] = {
[BOARD_MF634] = {
.name = "mf634",
.bar_nums = {0, 2, 3},
},
[BOARD_MF624] = {
.name = "mf624",
.bar_nums = {0, 2, 4},
},
};
struct mf6x4_private {
/*
* Documentation for both MF634 and MF624 describes registers
* present in BAR0, 1 and 2 regions.
* The real (i.e. in HW) BAR numbers are different for MF624
* and MF634 yet we will call them 0, 1, 2
*/
void __iomem *bar0_mem;
void __iomem *bar2_mem;
/*
* This configuration register has the same function and fields
* for both cards however it lies in different BARs on different
* offsets -- this variable makes the access easier
*/
void __iomem *gpioc_reg;
};
static int mf6x4_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
return insn->n;
}
static int mf6x4_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
if (comedi_dio_update_state(s, data))
iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
data[1] = s->state;
return insn->n;
}
static int mf6x4_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
struct mf6x4_private *devpriv = dev->private;
unsigned int status;
status = ioread32(devpriv->gpioc_reg);
if (status & MF6X4_GPIOC_EOLC)
return 0;
return -EBUSY;
}
static int mf6x4_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int d;
int ret;
int i;
/* Set the ADC channel number in the scan list */
iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
for (i = 0; i < insn->n; i++) {
/* Trigger ADC conversion by reading ADSTART */
ioread16(dev->mmio + MF6X4_ADSTART_REG);
ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
if (ret)
return ret;
/* Read the actual value */
d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
d &= s->maxdata;
/* munge the 2's complement data to offset binary */
data[i] = comedi_offset_munge(s, d);
}
iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
return insn->n;
}
static int mf6x4_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct mf6x4_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
unsigned int gpioc;
int i;
/* Enable instantaneous update of converters outputs + Enable DACs */
gpioc = ioread32(devpriv->gpioc_reg);
iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
devpriv->gpioc_reg);
for (i = 0; i < insn->n; i++) {
val = data[i];
iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
}
s->readback[chan] = val;
return insn->n;
}
static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
const struct mf6x4_board *board = NULL;
struct mf6x4_private *devpriv;
struct comedi_subdevice *s;
int ret;
if (context < ARRAY_SIZE(mf6x4_boards))
board = &mf6x4_boards[context];
else
return -ENODEV;
dev->board_ptr = board;
dev->board_name = board->name;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
if (!devpriv->bar0_mem)
return -ENODEV;
dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
if (!dev->mmio)
return -ENODEV;
devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
if (!devpriv->bar2_mem)
return -ENODEV;
if (board == &mf6x4_boards[BOARD_MF634])
devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
else
devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
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;
s->n_chan = 8;
s->maxdata = 0x3fff;
s->range_table = &range_bipolar10;
s->insn_read = mf6x4_ai_insn_read;
/* Analog Output subdevice */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->maxdata = 0x3fff;
s->range_table = &range_bipolar10;
s->insn_write = mf6x4_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
/* Digital Input subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = mf6x4_di_insn_bits;
/* Digital Output subdevice */
s = &dev->subdevices[3];
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = mf6x4_do_insn_bits;
return 0;
}
static void mf6x4_detach(struct comedi_device *dev)
{
struct mf6x4_private *devpriv = dev->private;
if (devpriv) {
if (devpriv->bar0_mem)
iounmap(devpriv->bar0_mem);
if (devpriv->bar2_mem)
iounmap(devpriv->bar2_mem);
}
comedi_pci_detach(dev);
}
static struct comedi_driver mf6x4_driver = {
.driver_name = "mf6x4",
.module = THIS_MODULE,
.auto_attach = mf6x4_auto_attach,
.detach = mf6x4_detach,
};
static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
}
static const struct pci_device_id mf6x4_pci_table[] = {
{ PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
{ PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
static struct pci_driver mf6x4_pci_driver = {
.name = "mf6x4",
.id_table = mf6x4_pci_table,
.probe = mf6x4_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
MODULE_LICENSE("GPL");