--- /dev/null
+/*
+ * ni_6527.c
+ * Comedi driver for National Instruments PCI-6527
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1999,2002,2003 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: ni_6527
+ * Description: National Instruments 6527
+ * Devices: [National Instruments] PCI-6527 (pci-6527), PXI-6527 (pxi-6527)
+ * Author: David A. Schleef <ds@schleef.org>
+ * Updated: Sat, 25 Jan 2003 13:24:40 -0800
+ * Status: works
+ *
+ * Configuration Options: not applicable, uses PCI auto config
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+
+#include "../comedi_pci.h"
+
+/*
+ * PCI BAR1 - Register memory map
+ *
+ * Manuals (available from ftp://ftp.natinst.com/support/manuals)
+ * 370106b.pdf 6527 Register Level Programmer Manual
+ */
+#define NI6527_DI_REG(x) (0x00 + (x))
+#define NI6527_DO_REG(x) (0x03 + (x))
+#define NI6527_ID_REG 0x06
+#define NI6527_CLR_REG 0x07
+#define NI6527_CLR_EDGE (1 << 3)
+#define NI6527_CLR_OVERFLOW (1 << 2)
+#define NI6527_CLR_FILT (1 << 1)
+#define NI6527_CLR_INTERVAL (1 << 0)
+#define NI6527_CLR_IRQS (NI6527_CLR_EDGE | NI6527_CLR_OVERFLOW)
+#define NI6527_CLR_RESET_FILT (NI6527_CLR_FILT | NI6527_CLR_INTERVAL)
+#define NI6527_FILT_INTERVAL_REG(x) (0x08 + (x))
+#define NI6527_FILT_ENA_REG(x) (0x0c + (x))
+#define NI6527_STATUS_REG 0x14
+#define NI6527_STATUS_IRQ (1 << 2)
+#define NI6527_STATUS_OVERFLOW (1 << 1)
+#define NI6527_STATUS_EDGE (1 << 0)
+#define NI6527_CTRL_REG 0x15
+#define NI6527_CTRL_FALLING (1 << 4)
+#define NI6527_CTRL_RISING (1 << 3)
+#define NI6527_CTRL_IRQ (1 << 2)
+#define NI6527_CTRL_OVERFLOW (1 << 1)
+#define NI6527_CTRL_EDGE (1 << 0)
+#define NI6527_CTRL_DISABLE_IRQS 0
+#define NI6527_CTRL_ENABLE_IRQS (NI6527_CTRL_FALLING | \
+ NI6527_CTRL_RISING | \
+ NI6527_CTRL_IRQ | NI6527_CTRL_EDGE)
+#define NI6527_RISING_EDGE_REG(x) (0x18 + (x))
+#define NI6527_FALLING_EDGE_REG(x) (0x20 + (x))
+
+enum ni6527_boardid {
+ BOARD_PCI6527,
+ BOARD_PXI6527,
+};
+
+struct ni6527_board {
+ const char *name;
+};
+
+static const struct ni6527_board ni6527_boards[] = {
+ [BOARD_PCI6527] = {
+ .name = "pci-6527",
+ },
+ [BOARD_PXI6527] = {
+ .name = "pxi-6527",
+ },
+};
+
+struct ni6527_private {
+ unsigned int filter_interval;
+ unsigned int filter_enable;
+};
+
+static void ni6527_set_filter_interval(struct comedi_device *dev,
+ unsigned int val)
+{
+ struct ni6527_private *devpriv = dev->private;
+
+ if (val != devpriv->filter_interval) {
+ writeb(val & 0xff, dev->mmio + NI6527_FILT_INTERVAL_REG(0));
+ writeb((val >> 8) & 0xff,
+ dev->mmio + NI6527_FILT_INTERVAL_REG(1));
+ writeb((val >> 16) & 0x0f,
+ dev->mmio + NI6527_FILT_INTERVAL_REG(2));
+
+ writeb(NI6527_CLR_INTERVAL, dev->mmio + NI6527_CLR_REG);
+
+ devpriv->filter_interval = val;
+ }
+}
+
+static void ni6527_set_filter_enable(struct comedi_device *dev,
+ unsigned int val)
+{
+ writeb(val & 0xff, dev->mmio + NI6527_FILT_ENA_REG(0));
+ writeb((val >> 8) & 0xff, dev->mmio + NI6527_FILT_ENA_REG(1));
+ writeb((val >> 16) & 0xff, dev->mmio + NI6527_FILT_ENA_REG(2));
+}
+
+static int ni6527_di_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct ni6527_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int interval;
+
+ switch (data[0]) {
+ case INSN_CONFIG_FILTER:
+ /*
+ * The deglitch filter interval is specified in nanoseconds.
+ * The hardware supports intervals in 200ns increments. Round
+ * the user values up and return the actual interval.
+ */
+ interval = (data[1] + 100) / 200;
+ data[1] = interval * 200;
+
+ if (interval) {
+ ni6527_set_filter_interval(dev, interval);
+ devpriv->filter_enable |= 1 << chan;
+ } else {
+ devpriv->filter_enable &= ~(1 << chan);
+ }
+ ni6527_set_filter_enable(dev, devpriv->filter_enable);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return insn->n;
+}
+
+static int ni6527_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int val;
+
+ val = readb(dev->mmio + NI6527_DI_REG(0));
+ val |= (readb(dev->mmio + NI6527_DI_REG(1)) << 8);
+ val |= (readb(dev->mmio + NI6527_DI_REG(2)) << 16);
+
+ data[1] = val;
+
+ return insn->n;
+}
+
+static int ni6527_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int mask;
+
+ mask = comedi_dio_update_state(s, data);
+ if (mask) {
+ /* Outputs are inverted */
+ unsigned int val = s->state ^ 0xffffff;
+
+ if (mask & 0x0000ff)
+ writeb(val & 0xff, dev->mmio + NI6527_DO_REG(0));
+ if (mask & 0x00ff00)
+ writeb((val >> 8) & 0xff,
+ dev->mmio + NI6527_DO_REG(1));
+ if (mask & 0xff0000)
+ writeb((val >> 16) & 0xff,
+ dev->mmio + NI6527_DO_REG(2));
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static irqreturn_t ni6527_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ struct comedi_subdevice *s = dev->read_subdev;
+ unsigned int status;
+
+ status = readb(dev->mmio + NI6527_STATUS_REG);
+ if (!(status & NI6527_STATUS_IRQ))
+ return IRQ_NONE;
+
+ if (status & NI6527_STATUS_EDGE) {
+ comedi_buf_write_samples(s, &s->state, 1);
+ comedi_handle_events(dev, s);
+ }
+
+ writeb(NI6527_CLR_IRQS, dev->mmio + NI6527_CLR_REG);
+
+ return IRQ_HANDLED;
+}
+
+static int ni6527_intr_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_OTHER);
+ err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+ /* Step 2b : and mutually compatible */
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments */
+
+ /* Step 5: check channel list if it exists */
+
+ return 0;
+}
+
+static int ni6527_intr_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ writeb(NI6527_CLR_IRQS, dev->mmio + NI6527_CLR_REG);
+ writeb(NI6527_CTRL_ENABLE_IRQS, dev->mmio + NI6527_CTRL_REG);
+
+ return 0;
+}
+
+static int ni6527_intr_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ writeb(NI6527_CTRL_DISABLE_IRQS, dev->mmio + NI6527_CTRL_REG);
+
+ return 0;
+}
+
+static int ni6527_intr_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ data[1] = 0;
+ return insn->n;
+}
+
+static void ni6527_set_edge_detection(struct comedi_device *dev,
+ unsigned int mask,
+ unsigned int rising,
+ unsigned int falling)
+{
+ unsigned int i;
+
+ rising &= mask;
+ falling &= mask;
+ for (i = 0; i < 2; i++) {
+ if (mask & 0xff) {
+ if (~mask & 0xff) {
+ /* preserve rising-edge detection channels */
+ rising |= readb(dev->mmio +
+ NI6527_RISING_EDGE_REG(i)) &
+ (~mask & 0xff);
+ /* preserve falling-edge detection channels */
+ falling |= readb(dev->mmio +
+ NI6527_FALLING_EDGE_REG(i)) &
+ (~mask & 0xff);
+ }
+ /* update rising-edge detection channels */
+ writeb(rising & 0xff,
+ dev->mmio + NI6527_RISING_EDGE_REG(i));
+ /* update falling-edge detection channels */
+ writeb(falling & 0xff,
+ dev->mmio + NI6527_FALLING_EDGE_REG(i));
+ }
+ rising >>= 8;
+ falling >>= 8;
+ mask >>= 8;
+ }
+}
+
+static int ni6527_intr_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int mask = 0xffffffff;
+ unsigned int rising, falling, shift;
+
+ switch (data[0]) {
+ case INSN_CONFIG_CHANGE_NOTIFY:
+ /* check_insn_config_length() does not check this instruction */
+ if (insn->n != 3)
+ return -EINVAL;
+ rising = data[1];
+ falling = data[2];
+ ni6527_set_edge_detection(dev, mask, rising, falling);
+ break;
+ case INSN_CONFIG_DIGITAL_TRIG:
+ /* check trigger number */
+ if (data[1] != 0)
+ return -EINVAL;
+ /* check digital trigger operation */
+ switch (data[2]) {
+ case COMEDI_DIGITAL_TRIG_DISABLE:
+ rising = 0;
+ falling = 0;
+ break;
+ case COMEDI_DIGITAL_TRIG_ENABLE_EDGES:
+ /* check shift amount */
+ shift = data[3];
+ if (shift >= s->n_chan) {
+ mask = 0;
+ rising = 0;
+ falling = 0;
+ } else {
+ mask <<= shift;
+ rising = data[4] << shift;
+ falling = data[5] << shift;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ ni6527_set_edge_detection(dev, mask, rising, falling);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return insn->n;
+}
+
+static void ni6527_reset(struct comedi_device *dev)
+{
+ /* disable deglitch filters on all channels */
+ ni6527_set_filter_enable(dev, 0);
+
+ /* disable edge detection */
+ ni6527_set_edge_detection(dev, 0xffffffff, 0, 0);
+
+ writeb(NI6527_CLR_IRQS | NI6527_CLR_RESET_FILT,
+ dev->mmio + NI6527_CLR_REG);
+ writeb(NI6527_CTRL_DISABLE_IRQS, dev->mmio + NI6527_CTRL_REG);
+}
+
+static int ni6527_auto_attach(struct comedi_device *dev,
+ unsigned long context)
+{
+ struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+ const struct ni6527_board *board = NULL;
+ struct ni6527_private *devpriv;
+ struct comedi_subdevice *s;
+ int ret;
+
+ if (context < ARRAY_SIZE(ni6527_boards))
+ board = &ni6527_boards[context];
+ if (!board)
+ return -ENODEV;
+ dev->board_ptr = board;
+ dev->board_name = board->name;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ ret = comedi_pci_enable(dev);
+ if (ret)
+ return ret;
+
+ dev->mmio = pci_ioremap_bar(pcidev, 1);
+ if (!dev->mmio)
+ return -ENOMEM;
+
+ /* make sure this is actually a 6527 device */
+ if (readb(dev->mmio + NI6527_ID_REG) != 0x27)
+ return -ENODEV;
+
+ ni6527_reset(dev);
+
+ ret = request_irq(pcidev->irq, ni6527_interrupt, IRQF_SHARED,
+ dev->board_name, dev);
+ if (ret == 0)
+ dev->irq = pcidev->irq;
+
+ ret = comedi_alloc_subdevices(dev, 3);
+ if (ret)
+ return ret;
+
+ /* Digital Input subdevice */
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 24;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_config = ni6527_di_insn_config;
+ s->insn_bits = ni6527_di_insn_bits;
+
+ /* Digital Output subdevice */
+ s = &dev->subdevices[1];
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 24;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = ni6527_do_insn_bits;
+
+ /* Edge detection interrupt subdevice */
+ s = &dev->subdevices[2];
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+ s->n_chan = 1;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_config = ni6527_intr_insn_config;
+ s->insn_bits = ni6527_intr_insn_bits;
+ s->len_chanlist = 1;
+ s->do_cmdtest = ni6527_intr_cmdtest;
+ s->do_cmd = ni6527_intr_cmd;
+ s->cancel = ni6527_intr_cancel;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ return 0;
+}
+
+static void ni6527_detach(struct comedi_device *dev)
+{
+ if (dev->mmio)
+ ni6527_reset(dev);
+ comedi_pci_detach(dev);
+}
+
+static struct comedi_driver ni6527_driver = {
+ .driver_name = "ni_6527",
+ .module = THIS_MODULE,
+ .auto_attach = ni6527_auto_attach,
+ .detach = ni6527_detach,
+};
+
+static int ni6527_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ return comedi_pci_auto_config(dev, &ni6527_driver, id->driver_data);
+}
+
+static const struct pci_device_id ni6527_pci_table[] = {
+ { PCI_VDEVICE(NI, 0x2b10), BOARD_PXI6527 },
+ { PCI_VDEVICE(NI, 0x2b20), BOARD_PCI6527 },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, ni6527_pci_table);
+
+static struct pci_driver ni6527_pci_driver = {
+ .name = "ni_6527",
+ .id_table = ni6527_pci_table,
+ .probe = ni6527_pci_probe,
+ .remove = comedi_pci_auto_unconfig,
+};
+module_comedi_pci_driver(ni6527_driver, ni6527_pci_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi driver for National Instruments PCI-6527");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff