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![Shane Warden](/assets/img/avatar_default.png)
Signed-off-by: Shane Warden <shane.warden@onyxneon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
559 lines
17 KiB
C
559 lines
17 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 "comedi.h"
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#define DPRINTK(format, args...) do { \
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if (comedi_debug) \
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printk(KERN_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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#define COMEDI_INITCLEANUP_NOMODULE(x) \
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static int __init x ## _init_module(void) \
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{return comedi_driver_register(&(x)); } \
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static void __exit x ## _cleanup_module(void) \
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{comedi_driver_unregister(&(x)); } \
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module_init(x ## _init_module); \
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module_exit(x ## _cleanup_module);
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#define COMEDI_MODULE_MACROS \
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MODULE_AUTHOR("Comedi http://www.comedi.org"); \
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MODULE_DESCRIPTION("Comedi low-level driver"); \
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MODULE_LICENSE("GPL");
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#define COMEDI_INITCLEANUP(x) \
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COMEDI_MODULE_MACROS \
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COMEDI_INITCLEANUP_NOMODULE(x)
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#define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \
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static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \
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const struct pci_device_id *ent) \
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{ \
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return comedi_pci_auto_config(dev, comedi_driver.driver_name); \
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} \
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static void __devexit comedi_driver ## _pci_remove(\
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struct pci_dev *dev) \
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{ \
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comedi_pci_auto_unconfig(dev); \
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} \
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static struct pci_driver comedi_driver ## _pci_driver = \
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{ \
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.id_table = pci_id_table, \
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.probe = &comedi_driver ## _pci_probe, \
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.remove = __devexit_p(&comedi_driver ## _pci_remove) \
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}; \
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static int __init comedi_driver ## _init_module(void) \
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{ \
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int retval; \
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retval = comedi_driver_register(&comedi_driver); \
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if (retval < 0) \
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return retval; \
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comedi_driver ## _pci_driver.name = \
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(char *)comedi_driver.driver_name; \
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return pci_register_driver(&comedi_driver ## _pci_driver); \
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} \
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static void __exit comedi_driver ## _cleanup_module(void) \
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{ \
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pci_unregister_driver(&comedi_driver ## _pci_driver); \
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comedi_driver_unregister(&comedi_driver); \
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} \
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module_init(comedi_driver ## _init_module); \
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module_exit(comedi_driver ## _cleanup_module);
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#define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \
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COMEDI_MODULE_MACROS \
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COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table)
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#define PCI_VENDOR_ID_INOVA 0x104c
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#define PCI_VENDOR_ID_NATINST 0x1093
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#define PCI_VENDOR_ID_DATX 0x1116
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#define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
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#define PCI_VENDOR_ID_ADVANTECH 0x13fe
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#define PCI_VENDOR_ID_RTD 0x1435
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#define PCI_VENDOR_ID_AMPLICON 0x14dc
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#define PCI_VENDOR_ID_ADLINK 0x144a
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#define PCI_VENDOR_ID_ICP 0x104c
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#define PCI_VENDOR_ID_CONTEC 0x1221
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#define PCI_VENDOR_ID_MEILHAUS 0x1402
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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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#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
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device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)
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struct comedi_subdevice {
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struct comedi_device *device;
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int type;
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int n_chan;
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volatile 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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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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int (*detach) (struct comedi_device *);
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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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void (*open) (struct comedi_device *dev);
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void (*close) (struct comedi_device *dev);
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};
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struct comedi_device_file_info {
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struct comedi_device *device;
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struct comedi_subdevice *read_subdevice;
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struct comedi_subdevice *write_subdevice;
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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_file_info *comedi_get_device_file_info(unsigned minor);
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static inline struct comedi_subdevice *comedi_get_read_subdevice(
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const struct comedi_device_file_info *info)
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{
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if (info->read_subdevice)
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return info->read_subdevice;
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if (info->device == NULL)
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return NULL;
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return info->device->read_subdev;
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}
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static inline struct comedi_subdevice *comedi_get_write_subdevice(
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const struct comedi_device_file_info *info)
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{
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if (info->write_subdevice)
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return info->write_subdevice;
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if (info->device == NULL)
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return NULL;
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return info->device->write_subdev;
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}
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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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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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int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s,
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unsigned long new_size);
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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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/*
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various internal comedi functions
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*/
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int do_rangeinfo_ioctl(struct comedi_device *dev, struct comedi_rangeinfo *arg);
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int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist);
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void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask,
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unsigned bits);
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unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);
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int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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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} /* XXX */
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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 int alloc_subdevices(struct comedi_device *dev,
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unsigned int num_subdevices)
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{
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unsigned i;
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dev->n_subdevices = num_subdevices;
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dev->subdevices =
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kcalloc(num_subdevices, sizeof(struct comedi_subdevice),
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GFP_KERNEL);
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if (!dev->subdevices)
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return -ENOMEM;
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for (i = 0; i < num_subdevices; ++i) {
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dev->subdevices[i].device = dev;
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dev->subdevices[i].async_dma_dir = DMA_NONE;
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spin_lock_init(&dev->subdevices[i].spin_lock);
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dev->subdevices[i].minor = -1;
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}
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return 0;
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}
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static inline int alloc_private(struct comedi_device *dev, int size)
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{
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dev->private = kzalloc(size, GFP_KERNEL);
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if (!dev->private)
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return -ENOMEM;
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return 0;
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}
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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)
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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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int comedi_buf_put(struct comedi_async *async, short x);
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int comedi_buf_get(struct comedi_async *async, short *x);
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unsigned int comedi_buf_write_n_available(struct comedi_async *async);
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unsigned int comedi_buf_write_alloc(struct comedi_async *async,
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unsigned int nbytes);
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unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
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unsigned int nbytes);
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unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
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unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
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unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
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unsigned int comedi_buf_read_n_available(struct comedi_async *async);
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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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static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
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{
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return async->buf_write_alloc_count - async->buf_write_count;
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}
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static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
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{
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return async->buf_read_alloc_count - async->buf_read_count;
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}
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void comedi_reset_async_buf(struct comedi_async *async);
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static inline void *comedi_aux_data(int options[], int n)
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{
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unsigned long address;
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unsigned long addressLow;
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int bit_shift;
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if (sizeof(int) >= sizeof(void *))
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address = options[COMEDI_DEVCONF_AUX_DATA_LO];
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else {
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address = options[COMEDI_DEVCONF_AUX_DATA_HI];
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bit_shift = sizeof(int) * 8;
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address <<= bit_shift;
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addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
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addressLow &= (1UL << bit_shift) - 1;
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address |= addressLow;
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}
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if (n >= 1)
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address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
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if (n >= 2)
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address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
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if (n >= 3)
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address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
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BUG_ON(n > 3);
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return (void *)address;
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}
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int comedi_alloc_board_minor(struct device *hardware_device);
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void comedi_free_board_minor(unsigned minor);
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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_pci_auto_config(struct pci_dev *pcidev, const char *board_name);
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void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
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struct usb_device; /* forward declaration */
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int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name);
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void comedi_usb_auto_unconfig(struct usb_device *usbdev);
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#ifdef CONFIG_COMEDI_PCI_DRIVERS
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#define CONFIG_COMEDI_PCI
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#endif
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#ifdef CONFIG_COMEDI_PCI_DRIVERS_MODULE
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#define CONFIG_COMEDI_PCI
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#endif
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#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
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#define CONFIG_COMEDI_PCMCIA
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#endif
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#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS_MODULE
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#define CONFIG_COMEDI_PCMCIA
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#endif
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#endif /* _COMEDIDEV_H */
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