501 lines
15 KiB
C
501 lines
15 KiB
C
/*
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include/linux/comedidev.h
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header file for kernel-only structures, variables, and constants
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _COMEDIDEV_H
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#define _COMEDIDEV_H
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/kdev_t.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/wait.h>
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/vmalloc.h>
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#include <linux/dma-mapping.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <linux/timer.h>
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#include <linux/pci.h>
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#include <linux/usb.h>
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#include "comedi.h"
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#define DPRINTK(format, args...) do { \
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if (comedi_debug) \
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pr_debug("comedi: " format, ## args); \
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} while (0)
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#define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
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#define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, \
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COMEDI_MINORVERSION, COMEDI_MICROVERSION)
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#define COMEDI_RELEASE VERSION
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/*
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* PCI Vendor IDs not in <linux/pci_ids.h>
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*/
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#define PCI_VENDOR_ID_KOLTER 0x1001
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#define PCI_VENDOR_ID_ICP 0x104c
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#define PCI_VENDOR_ID_AMCC 0x10e8
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#define PCI_VENDOR_ID_DT 0x1116
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#define PCI_VENDOR_ID_IOTECH 0x1616
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#define PCI_VENDOR_ID_CONTEC 0x1221
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#define PCI_VENDOR_ID_CB 0x1307 /* Measurement Computing */
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#define PCI_VENDOR_ID_ADVANTECH 0x13fe
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#define PCI_VENDOR_ID_MEILHAUS 0x1402
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#define PCI_VENDOR_ID_RTD 0x1435
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#define PCI_VENDOR_ID_ADLINK 0x144a
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#define PCI_VENDOR_ID_AMPLICON 0x14dc
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#define COMEDI_NUM_MINORS 0x100
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#define COMEDI_NUM_BOARD_MINORS 0x30
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#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS
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struct comedi_subdevice {
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struct comedi_device *device;
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int index;
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int type;
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int n_chan;
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int subdev_flags;
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int len_chanlist; /* maximum length of channel/gain list */
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void *private;
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struct comedi_async *async;
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void *lock;
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void *busy;
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unsigned runflags;
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spinlock_t spin_lock;
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unsigned int io_bits;
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unsigned int maxdata; /* if maxdata==0, use list */
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const unsigned int *maxdata_list; /* list is channel specific */
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unsigned int flags;
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const unsigned int *flaglist;
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unsigned int settling_time_0;
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const struct comedi_lrange *range_table;
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const struct comedi_lrange *const *range_table_list;
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unsigned int *chanlist; /* driver-owned chanlist (not used) */
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int (*insn_read) (struct comedi_device *, struct comedi_subdevice *,
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struct comedi_insn *, unsigned int *);
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int (*insn_write) (struct comedi_device *, struct comedi_subdevice *,
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struct comedi_insn *, unsigned int *);
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int (*insn_bits) (struct comedi_device *, struct comedi_subdevice *,
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struct comedi_insn *, unsigned int *);
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int (*insn_config) (struct comedi_device *, struct comedi_subdevice *,
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struct comedi_insn *, unsigned int *);
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int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *);
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int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *,
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struct comedi_cmd *);
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int (*poll) (struct comedi_device *, struct comedi_subdevice *);
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int (*cancel) (struct comedi_device *, struct comedi_subdevice *);
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/* int (*do_lock)(struct comedi_device *, struct comedi_subdevice *); */
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/* int (*do_unlock)(struct comedi_device *, \
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struct comedi_subdevice *); */
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/* called when the buffer changes */
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int (*buf_change) (struct comedi_device *dev,
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struct comedi_subdevice *s, unsigned long new_size);
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void (*munge) (struct comedi_device *dev, struct comedi_subdevice *s,
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void *data, unsigned int num_bytes,
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unsigned int start_chan_index);
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enum dma_data_direction async_dma_dir;
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unsigned int state;
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struct device *class_dev;
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int minor;
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};
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struct comedi_buf_page {
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void *virt_addr;
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dma_addr_t dma_addr;
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};
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struct comedi_async {
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struct comedi_subdevice *subdevice;
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void *prealloc_buf; /* pre-allocated buffer */
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unsigned int prealloc_bufsz; /* buffer size, in bytes */
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/* virtual and dma address of each page */
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struct comedi_buf_page *buf_page_list;
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unsigned n_buf_pages; /* num elements in buf_page_list */
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unsigned int max_bufsize; /* maximum buffer size, bytes */
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/* current number of mmaps of prealloc_buf */
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unsigned int mmap_count;
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/* byte count for writer (write completed) */
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unsigned int buf_write_count;
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/* byte count for writer (allocated for writing) */
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unsigned int buf_write_alloc_count;
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/* byte count for reader (read completed) */
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unsigned int buf_read_count;
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/* byte count for reader (allocated for reading) */
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unsigned int buf_read_alloc_count;
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unsigned int buf_write_ptr; /* buffer marker for writer */
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unsigned int buf_read_ptr; /* buffer marker for reader */
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unsigned int cur_chan; /* useless channel marker for interrupt */
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/* number of bytes that have been received for current scan */
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unsigned int scan_progress;
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/* keeps track of where we are in chanlist as for munging */
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unsigned int munge_chan;
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/* number of bytes that have been munged */
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unsigned int munge_count;
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/* buffer marker for munging */
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unsigned int munge_ptr;
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unsigned int events; /* events that have occurred */
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struct comedi_cmd cmd;
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wait_queue_head_t wait_head;
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/* callback stuff */
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unsigned int cb_mask;
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int (*cb_func) (unsigned int flags, void *);
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void *cb_arg;
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int (*inttrig) (struct comedi_device *dev, struct comedi_subdevice *s,
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unsigned int x);
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};
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struct comedi_driver {
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struct comedi_driver *next;
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const char *driver_name;
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struct module *module;
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int (*attach) (struct comedi_device *, struct comedi_devconfig *);
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void (*detach) (struct comedi_device *);
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int (*auto_attach) (struct comedi_device *, unsigned long);
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/* number of elements in board_name and board_id arrays */
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unsigned int num_names;
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const char *const *board_name;
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/* offset in bytes from one board name pointer to the next */
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int offset;
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};
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struct comedi_device {
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int use_count;
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struct comedi_driver *driver;
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void *private;
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struct device *class_dev;
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int minor;
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/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
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* for subdevices that have async_dma_dir set to something other than
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* DMA_NONE */
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struct device *hw_dev;
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const char *board_name;
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const void *board_ptr;
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int attached;
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spinlock_t spinlock;
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struct mutex mutex;
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int in_request_module;
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int n_subdevices;
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struct comedi_subdevice *subdevices;
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/* dumb */
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unsigned long iobase;
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unsigned int irq;
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struct comedi_subdevice *read_subdev;
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struct comedi_subdevice *write_subdev;
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struct fasync_struct *async_queue;
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int (*open) (struct comedi_device *dev);
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void (*close) (struct comedi_device *dev);
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};
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static inline const void *comedi_board(const struct comedi_device *dev)
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{
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return dev->board_ptr;
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}
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#ifdef CONFIG_COMEDI_DEBUG
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extern int comedi_debug;
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#else
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static const int comedi_debug;
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#endif
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/*
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* function prototypes
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*/
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void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s);
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void comedi_error(const struct comedi_device *dev, const char *s);
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/* we can expand the number of bits used to encode devices/subdevices into
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the minor number soon, after more distros support > 8 bit minor numbers
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(like after Debian Etch gets released) */
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enum comedi_minor_bits {
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COMEDI_DEVICE_MINOR_MASK = 0xf,
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COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
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};
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static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
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static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
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struct comedi_device *comedi_dev_from_minor(unsigned minor);
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int comedi_alloc_subdevices(struct comedi_device *, int);
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void comedi_device_detach(struct comedi_device *dev);
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int comedi_device_attach(struct comedi_device *dev,
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struct comedi_devconfig *it);
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int comedi_driver_register(struct comedi_driver *);
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int comedi_driver_unregister(struct comedi_driver *);
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/**
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* module_comedi_driver() - Helper macro for registering a comedi driver
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* @__comedi_driver: comedi_driver struct
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*
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* Helper macro for comedi drivers which do not do anything special in module
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* init/exit. This eliminates a lot of boilerplate. Each module may only use
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* this macro once, and calling it replaces module_init() and module_exit().
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*/
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#define module_comedi_driver(__comedi_driver) \
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module_driver(__comedi_driver, comedi_driver_register, \
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comedi_driver_unregister)
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int comedi_pci_enable(struct pci_dev *, const char *);
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void comedi_pci_disable(struct pci_dev *);
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int comedi_pci_driver_register(struct comedi_driver *, struct pci_driver *);
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void comedi_pci_driver_unregister(struct comedi_driver *, struct pci_driver *);
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/**
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* module_comedi_pci_driver() - Helper macro for registering a comedi PCI driver
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* @__comedi_driver: comedi_driver struct
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* @__pci_driver: pci_driver struct
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*
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* Helper macro for comedi PCI drivers which do not do anything special
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* in module init/exit. This eliminates a lot of boilerplate. Each
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* module may only use this macro once, and calling it replaces
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* module_init() and module_exit()
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*/
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#define module_comedi_pci_driver(__comedi_driver, __pci_driver) \
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module_driver(__comedi_driver, comedi_pci_driver_register, \
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comedi_pci_driver_unregister, &(__pci_driver))
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struct pcmcia_driver;
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int comedi_pcmcia_driver_register(struct comedi_driver *,
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struct pcmcia_driver *);
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void comedi_pcmcia_driver_unregister(struct comedi_driver *,
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struct pcmcia_driver *);
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/**
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* module_comedi_pcmcia_driver() - Helper macro for registering a comedi PCMCIA driver
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* @__comedi_driver: comedi_driver struct
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* @__pcmcia_driver: pcmcia_driver struct
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*
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* Helper macro for comedi PCMCIA drivers which do not do anything special
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* in module init/exit. This eliminates a lot of boilerplate. Each
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* module may only use this macro once, and calling it replaces
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* module_init() and module_exit()
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*/
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#define module_comedi_pcmcia_driver(__comedi_driver, __pcmcia_driver) \
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module_driver(__comedi_driver, comedi_pcmcia_driver_register, \
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comedi_pcmcia_driver_unregister, &(__pcmcia_driver))
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struct usb_driver;
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int comedi_usb_driver_register(struct comedi_driver *, struct usb_driver *);
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void comedi_usb_driver_unregister(struct comedi_driver *, struct usb_driver *);
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/**
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* module_comedi_usb_driver() - Helper macro for registering a comedi USB driver
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* @__comedi_driver: comedi_driver struct
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* @__usb_driver: usb_driver struct
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*
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* Helper macro for comedi USB drivers which do not do anything special
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* in module init/exit. This eliminates a lot of boilerplate. Each
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* module may only use this macro once, and calling it replaces
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* module_init() and module_exit()
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*/
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#define module_comedi_usb_driver(__comedi_driver, __usb_driver) \
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module_driver(__comedi_driver, comedi_usb_driver_register, \
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comedi_usb_driver_unregister, &(__usb_driver))
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void init_polling(void);
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void cleanup_polling(void);
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void start_polling(struct comedi_device *);
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void stop_polling(struct comedi_device *);
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#ifdef CONFIG_PROC_FS
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void comedi_proc_init(void);
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void comedi_proc_cleanup(void);
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#else
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static inline void comedi_proc_init(void)
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{
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}
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static inline void comedi_proc_cleanup(void)
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{
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}
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#endif
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/* subdevice runflags */
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enum subdevice_runflags {
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SRF_USER = 0x00000001,
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SRF_RT = 0x00000002,
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/* indicates an COMEDI_CB_ERROR event has occurred since the last
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* command was started */
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SRF_ERROR = 0x00000004,
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SRF_RUNNING = 0x08000000
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};
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bool comedi_is_subdevice_running(struct comedi_subdevice *s);
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int comedi_check_chanlist(struct comedi_subdevice *s,
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int n,
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unsigned int *chanlist);
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/* range stuff */
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#define RANGE(a, b) {(a)*1e6, (b)*1e6, 0}
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#define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL}
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#define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA}
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#define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0}
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#define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0}
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#define UNI_RANGE(a) {0, (a)*1e6, 0}
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extern const struct comedi_lrange range_bipolar10;
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extern const struct comedi_lrange range_bipolar5;
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extern const struct comedi_lrange range_bipolar2_5;
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extern const struct comedi_lrange range_unipolar10;
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extern const struct comedi_lrange range_unipolar5;
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extern const struct comedi_lrange range_unknown;
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#define range_digital range_unipolar5
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#if __GNUC__ >= 3
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#define GCC_ZERO_LENGTH_ARRAY
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#else
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#define GCC_ZERO_LENGTH_ARRAY 0
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#endif
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struct comedi_lrange {
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int length;
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struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
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};
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/* some silly little inline functions */
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static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
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{
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if (subd->subdev_flags & SDF_LSAMPL)
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return sizeof(unsigned int);
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else
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return sizeof(short);
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}
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/* must be used in attach to set dev->hw_dev if you wish to dma directly
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into comedi's buffer */
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static inline void comedi_set_hw_dev(struct comedi_device *dev,
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struct device *hw_dev)
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{
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if (dev->hw_dev == hw_dev)
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return;
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if (dev->hw_dev)
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put_device(dev->hw_dev);
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dev->hw_dev = hw_dev;
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if (dev->hw_dev) {
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dev->hw_dev = get_device(dev->hw_dev);
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BUG_ON(dev->hw_dev == NULL);
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}
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}
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static inline struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
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{
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return dev->hw_dev ? to_pci_dev(dev->hw_dev) : NULL;
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}
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static inline struct usb_interface *
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comedi_to_usb_interface(struct comedi_device *dev)
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{
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return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
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}
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unsigned int comedi_buf_write_alloc(struct comedi_async *, unsigned int);
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unsigned int comedi_buf_write_free(struct comedi_async *, unsigned int);
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unsigned int comedi_buf_read_n_available(struct comedi_async *);
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unsigned int comedi_buf_read_alloc(struct comedi_async *, unsigned int);
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unsigned int comedi_buf_read_free(struct comedi_async *, unsigned int);
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int comedi_buf_put(struct comedi_async *, short);
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int comedi_buf_get(struct comedi_async *, short *);
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void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
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const void *source, unsigned int num_bytes);
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void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
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void *destination, unsigned int num_bytes);
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int comedi_alloc_subdevice_minor(struct comedi_device *dev,
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struct comedi_subdevice *s);
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void comedi_free_subdevice_minor(struct comedi_subdevice *s);
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int comedi_auto_config(struct device *hardware_device,
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struct comedi_driver *driver, unsigned long context);
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void comedi_auto_unconfig(struct device *hardware_device);
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static inline int comedi_pci_auto_config(struct pci_dev *pcidev,
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struct comedi_driver *driver)
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{
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return comedi_auto_config(&pcidev->dev, driver, 0);
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}
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void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
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static inline int comedi_usb_auto_config(struct usb_interface *intf,
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struct comedi_driver *driver)
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{
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return comedi_auto_config(&intf->dev, driver, 0);
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}
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static inline void comedi_usb_auto_unconfig(struct usb_interface *intf)
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{
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comedi_auto_unconfig(&intf->dev);
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}
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#endif /* _COMEDIDEV_H */
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