--- /dev/null
+/*
+ comedi/drivers/mpc8260.c
+ driver for digital I/O pins on the MPC 8260 CPM module
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 2000,2001 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.
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/timer.h>
+#include <asm/io.h>
+#include <linux/comedidev.h>
+
+
+/*
+ * Board descriptions for two imaginary boards. Describing the
+ * boards in this way is optional, and completely driver-dependent.
+ * Some drivers use arrays such as this, other do not.
+ */
+typedef struct skel_board_struct{
+ char *name;
+ int ai_chans;
+ int ai_bits;
+ int have_dio;
+}skel_board;
+skel_board skel_boards[] = {
+ {
+ name: "mpc8260cpm",
+ },
+};
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define thisboard ((skel_board *)dev->board_ptr)
+
+/* this structure is for data unique to this hardware driver. If
+ several hardware drivers keep similar information in this structure,
+ feel free to suggest moving the variable to the comedi_device struct. */
+typedef struct{
+ int data;
+
+ /* would be useful for a PCI device */
+ struct pci_dev *pci_dev;
+
+}skel_private;
+/*
+ * most drivers define the following macro to make it easy to
+ * access the private structure.
+ */
+#define devpriv ((skel_private *)dev->private)
+
+/*
+ * The comedi_driver structure tells the Comedi core module
+ * which functions to call to configure/deconfigure (attach/detach)
+ * the board, and also about the kernel module that contains
+ * the device code.
+ */
+static int skel_attach(comedi_device *dev,comedi_devconfig *it);
+static int skel_detach(comedi_device *dev);
+static int skel_register_boards(void);
+comedi_driver driver_skel={
+ driver_name: "dummy",
+ module: THIS_MODULE,
+ attach: skel_attach,
+ detach: skel_detach,
+ register_boards: skel_register_boards, // replacement for recognize
+};
+
+static int skel_dio_config(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
+static int skel_dio_bits(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
+
+/*
+ * Attach is called by the Comedi core to configure the driver
+ * for a particular board. _recognize() has already been called,
+ * and dev->board contains whatever _recognize returned.
+ */
+static int skel_attach(comedi_device *dev,comedi_devconfig *it)
+{
+ comedi_subdevice *s;
+ int i;
+
+ printk("comedi%d: mpc8260: ",dev->minor);
+
+/*
+ * Initialize dev->board_ptr. This can point to an element in the
+ * skel_boards array, for quick access to board-specific information.
+ */
+ dev->board_ptr = skel_boards + dev->board;
+
+/*
+ * Initialize dev->board_name. Note that we can use the "thisboard"
+ * macro now, since we just initialized it in the last line.
+ */
+ dev->board_name = thisboard->name;
+
+/*
+ * Allocate the private structure area.
+ */
+ if(alloc_private(dev,sizeof(skel_private))<0)
+ return -ENOMEM;
+
+/*
+ * Allocate the subdevice structures.
+ */
+ dev->n_subdevices=4;
+ if(alloc_subdevices(dev)<0)
+ return -ENOMEM;
+
+ for(i=0;i<4;i++){
+ s=dev->subdevices+i;
+ s->type=COMEDI_SUBD_DIO;
+ s->subdev_flags=SDF_READABLE|SDF_WRITEABLE;
+ s->n_chan=32;
+ s->maxdata=1;
+ s->range_table=&range_digital;
+ s->insn_config = &skel_dio_config;
+ s->insn_bits = &skel_dio_bits;
+ }
+
+ return 1;
+}
+
+
+/*
+ * _detach is called to deconfigure a device. It should deallocate
+ * resources.
+ * This function is also called when _attach() fails, so it should be
+ * careful not to release resources that were not necessarily
+ * allocated by _attach(). dev->private and dev->subdevices are
+ * deallocated automatically by the core.
+ */
+static int skel_detach(comedi_device *dev)
+{
+ printk("comedi%d: skel: remove\n",dev->minor);
+
+ return 0;
+}
+
+/*
+ * "instructions" read/write data in "one-shot" or "software-triggered"
+ * mode.
+ */
+static int skel_dio_config(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
+{
+ int n;
+ unsigned int d;
+
+
+ return 2;
+}
+
+static int skel_dio_bits(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
+{
+ int n;
+ unsigned int d;
+
+
+ return 2;
+}
+
+
+
+/*
+ * A convenient macro that defines init_module() and cleanup_module(),
+ * as necessary.
+ */
+COMEDI_INITCLEANUP(driver_skel);
+
projects / comedi.git / commitdiff