--- /dev/null
+/*
+ * 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, Humusoft MF624
+ * Author: Rostislav Lisovy <lisovy@gmail.com>
+ * Status: works
+ * Updated:
+ * Configuration Options: none
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "../comedidev.h"
+
+/* Registers present in BAR0 memory region */
+#define MF624_GPIOC_R 0x54
+
+#define MF6X4_GPIOC_EOLC /* End Of Last Conversion */ (1 << 17)
+#define MF6X4_GPIOC_LDAC /* Load DACs */ (1 << 23)
+#define MF6X4_GPIOC_DACEN (1 << 26)
+
+/* BAR1 registers */
+#define MF6X4_DIN_R 0x10
+#define MF6X4_DIN_M 0xff
+#define MF6X4_DOUT_R 0x10
+#define MF6X4_DOUT_M 0xff
+
+#define MF6X4_ADSTART_R 0x20
+#define MF6X4_ADDATA_R 0x00
+#define MF6X4_ADCTRL_R 0x00
+#define MF6X4_ADCTRL_M 0xff
+
+#define MF6X4_DA0_R 0x20
+#define MF6X4_DA1_R 0x22
+#define MF6X4_DA2_R 0x24
+#define MF6X4_DA3_R 0x26
+#define MF6X4_DA4_R 0x28
+#define MF6X4_DA5_R 0x2a
+#define MF6X4_DA6_R 0x2c
+#define MF6X4_DA7_R 0x2e
+/* Map DAC cahnnel id to real HW-dependent offset value */
+#define MF6X4_DAC_R(x) (0x20 + ((x) * 2))
+#define MF6X4_DA_M 0x3fff
+
+/* BAR2 registers */
+#define MF634_GPIOC_R 0x68
+
+enum mf6x4_boardid {
+ BOARD_MF634,
+ BOARD_MF624,
+};
+
+struct mf6x4_board {
+ const char *name;
+ unsigned int bar_nums[3]; /* We need to keep track of the
+ order of BARs used by the cards */
+};
+
+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 *bar1_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_R;
+
+ /* DAC value cache -- used for insn_read function */
+ int ao_readback[8];
+};
+
+static int mf6x4_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ struct mf6x4_private *devpriv = dev->private;
+
+ data[1] = ioread16(devpriv->bar1_mem + MF6X4_DIN_R) & MF6X4_DIN_M;
+
+ return insn->n;
+}
+
+static int mf6x4_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ struct mf6x4_private *devpriv = dev->private;
+
+ if (comedi_dio_update_state(s, data))
+ iowrite16(s->state & MF6X4_DOUT_M,
+ devpriv->bar1_mem + MF6X4_DOUT_R);
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int mf6x4_ai_wait_for_eoc(struct comedi_device *dev,
+ unsigned int timeout)
+{
+ struct mf6x4_private *devpriv = dev->private;
+ unsigned int eolc;
+
+ while (timeout--) {
+ eolc = ioread32(devpriv->gpioc_R) & MF6X4_GPIOC_EOLC;
+ if (eolc)
+ return 0;
+
+ udelay(1);
+ }
+
+ return -ETIME;
+}
+
+static int mf6x4_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ struct mf6x4_private *devpriv = dev->private;
+ int chan = CR_CHAN(insn->chanspec);
+ int ret;
+ int i;
+ int d;
+
+ /* Set the ADC channel number in the scan list */
+ iowrite16((1 << chan) & MF6X4_ADCTRL_M,
+ devpriv->bar1_mem + MF6X4_ADCTRL_R);
+
+ for (i = 0; i < insn->n; i++) {
+ /* Trigger ADC conversion by reading ADSTART */
+ ioread16(devpriv->bar1_mem + MF6X4_ADSTART_R);
+
+ ret = mf6x4_ai_wait_for_eoc(dev, 100);
+ if (ret)
+ return ret;
+
+ /* Read the actual value */
+ d = ioread16(devpriv->bar1_mem + MF6X4_ADDATA_R);
+ d &= s->maxdata;
+ data[i] = d;
+ }
+
+ iowrite16(0x0, devpriv->bar1_mem + MF6X4_ADCTRL_R);
+
+ 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);
+ uint32_t gpioc;
+ int i;
+
+ /* Enable instantaneous update of converters outputs + Enable DACs */
+ gpioc = ioread32(devpriv->gpioc_R);
+ iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
+ devpriv->gpioc_R);
+
+ for (i = 0; i < insn->n; i++) {
+ iowrite16(data[i] & MF6X4_DA_M,
+ devpriv->bar1_mem + MF6X4_DAC_R(chan));
+
+ devpriv->ao_readback[chan] = data[i];
+ }
+
+ return insn->n;
+}
+
+static int mf6x4_ao_insn_read(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);
+ int i;
+
+ for (i = 0; i < insn->n; i++)
+ data[i] = devpriv->ao_readback[chan];
+
+ 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;
+
+ devpriv->bar1_mem = pci_ioremap_bar(pcidev, board->bar_nums[1]);
+ if (!devpriv->bar1_mem)
+ 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_R = devpriv->bar2_mem + MF634_GPIOC_R;
+ else
+ devpriv->gpioc_R = devpriv->bar0_mem + MF624_GPIOC_R;
+
+
+ ret = comedi_alloc_subdevices(dev, 4);
+ if (ret)
+ return ret;
+
+ /* ADC */
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 8;
+ s->maxdata = 0x3fff; /* 14 bits ADC */
+ s->range_table = &range_bipolar10;
+ s->insn_read = mf6x4_ai_insn_read;
+
+ /* DAC */
+ s = &dev->subdevices[1];
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 8;
+ s->maxdata = 0x3fff; /* 14 bits DAC */
+ s->range_table = &range_bipolar10;
+ s->insn_write = mf6x4_ao_insn_write;
+ s->insn_read = mf6x4_ao_insn_read;
+
+ /* DIN */
+ 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;
+
+ /* DOUT */
+ 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->bar0_mem)
+ iounmap(devpriv->bar0_mem);
+ if (devpriv->bar1_mem)
+ iounmap(devpriv->bar1_mem);
+ if (devpriv->bar2_mem)
+ iounmap(devpriv->bar2_mem);
+
+ comedi_pci_disable(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");
projects / platform / kernel / linux-rpi.git / commitdiff