[linux-2.6-block.git] / drivers / staging / comedi / comedidev.h

/*
    include/linux/comedidev.h
    header file for kernel-only structures, variables, and constants

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    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.

*/

#ifndef _COMEDIDEV_H
#define _COMEDIDEV_H

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kdev_t.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/vmalloc.h>
#include "interrupt.h"
#include <linux/dma-mapping.h>
#include <linux/uaccess.h>
#include <linux/io.h>

#include "comedi.h"

#define DPRINTK(format, args...)	do {		\
	if (comedi_debug)				\
		printk(KERN_DEBUG "comedi: " format , ## args);	\
} while (0)

#define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
#define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION)
#define COMEDI_RELEASE VERSION

#define COMEDI_INITCLEANUP_NOMODULE(x)					\
	static int __init x ## _init_module(void)			\
		{return comedi_driver_register(&(x)); }			\
	static void __exit x ## _cleanup_module(void)			\
		{comedi_driver_unregister(&(x)); } 			\
	module_init(x ## _init_module);					\
	module_exit(x ## _cleanup_module);					\

#define COMEDI_MODULE_MACROS						\
	MODULE_AUTHOR("Comedi http://www.comedi.org");		\
	MODULE_DESCRIPTION("Comedi low-level driver");			\
	MODULE_LICENSE("GPL");						\

#define COMEDI_INITCLEANUP(x)						\
	COMEDI_MODULE_MACROS		\
	COMEDI_INITCLEANUP_NOMODULE(x)

#define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \
	static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \
		const struct pci_device_id *ent) \
	{ \
		return comedi_pci_auto_config(dev, comedi_driver.driver_name); \
	} \
	static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \
	{ \
		comedi_pci_auto_unconfig(dev); \
	} \
	static struct pci_driver comedi_driver ## _pci_driver = \
	{ \
		.id_table = pci_id_table, \
		.probe = &comedi_driver ## _pci_probe, \
		.remove = __devexit_p(&comedi_driver ## _pci_remove) \
	}; \
	static int __init comedi_driver ## _init_module(void) \
	{ \
		int retval; \
		retval = comedi_driver_register(&comedi_driver); \
		if (retval < 0) \
			return retval; \
		comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \
		return pci_register_driver(&comedi_driver ## _pci_driver); \
	} \
	static void __exit comedi_driver ## _cleanup_module(void) \
	{ \
		pci_unregister_driver(&comedi_driver ## _pci_driver); \
		comedi_driver_unregister(&comedi_driver); \
	} \
	module_init(comedi_driver ## _init_module); \
	module_exit(comedi_driver ## _cleanup_module);

#define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \
	COMEDI_MODULE_MACROS \
	COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table)

#define PCI_VENDOR_ID_INOVA		0x104c
#define PCI_VENDOR_ID_NATINST		0x1093
#define PCI_VENDOR_ID_DATX		0x1116
#define PCI_VENDOR_ID_COMPUTERBOARDS	0x1307
#define PCI_VENDOR_ID_ADVANTECH		0x13fe
#define PCI_VENDOR_ID_RTD		0x1435
#define PCI_VENDOR_ID_AMPLICON		0x14dc
#define PCI_VENDOR_ID_ADLINK		0x144a
#define PCI_VENDOR_ID_ICP		0x104c
#define PCI_VENDOR_ID_CONTEC		0x1221
#define PCI_VENDOR_ID_MEILHAUS		0x1402

#define COMEDI_NUM_MINORS 0x100
#define COMEDI_NUM_BOARD_MINORS 0x30
#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS

typedef struct device device_create_result_type;

#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
	device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)

struct comedi_subdevice {
	struct comedi_device *device;
	int type;
	int n_chan;
	volatile int subdev_flags;
	int len_chanlist;	/* maximum length of channel/gain list */

	void *private;

	struct comedi_async *async;

	void *lock;
	void *busy;
	unsigned runflags;
	spinlock_t spin_lock;

	int io_bits;

	unsigned int maxdata;	/* if maxdata==0, use list */
	const unsigned int *maxdata_list;	/* list is channel specific */

	unsigned int flags;
	const unsigned int *flaglist;

	unsigned int settling_time_0;

	const struct comedi_lrange *range_table;
	const struct comedi_lrange *const *range_table_list;

	unsigned int *chanlist;	/* driver-owned chanlist (not used) */

	int (*insn_read) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *,
		unsigned int *);
	int (*insn_write) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *,
		unsigned int *);
	int (*insn_bits) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *,
		unsigned int *);
	int (*insn_config) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *,
		unsigned int *);

	int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *);
	int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *, comedi_cmd *);
	int (*poll) (struct comedi_device *, struct comedi_subdevice *);
	int (*cancel) (struct comedi_device *, struct comedi_subdevice *);
	/* int (*do_lock)(struct comedi_device *,struct comedi_subdevice *); */
	/* int (*do_unlock)(struct comedi_device *,struct comedi_subdevice *); */

	/* called when the buffer changes */
	int (*buf_change) (struct comedi_device *dev, struct comedi_subdevice *s,
		unsigned long new_size);

	void (*munge) (struct comedi_device *dev, struct comedi_subdevice *s, void *data,
		unsigned int num_bytes, unsigned int start_chan_index);
	enum dma_data_direction async_dma_dir;

	unsigned int state;

	device_create_result_type *class_dev;
	int minor;
};

struct comedi_buf_page {
	void *virt_addr;
	dma_addr_t dma_addr;
};

struct comedi_async {
	struct comedi_subdevice *subdevice;

	void *prealloc_buf;	/* pre-allocated buffer */
	unsigned int prealloc_bufsz;	/* buffer size, in bytes */
	struct comedi_buf_page *buf_page_list;	/* virtual and dma address of each page */
	unsigned n_buf_pages;	/* num elements in buf_page_list */

	unsigned int max_bufsize;	/* maximum buffer size, bytes */
	unsigned int mmap_count;	/* current number of mmaps of prealloc_buf */

	unsigned int buf_write_count;	/* byte count for writer (write completed) */
	unsigned int buf_write_alloc_count;	/* byte count for writer (allocated for writing) */
	unsigned int buf_read_count;	/* byte count for reader (read completed) */
	unsigned int buf_read_alloc_count;	/* byte count for reader (allocated for reading) */

	unsigned int buf_write_ptr;	/* buffer marker for writer */
	unsigned int buf_read_ptr;	/* buffer marker for reader */

	unsigned int cur_chan;	/* useless channel marker for interrupt */
	/* number of bytes that have been received for current scan */
	unsigned int scan_progress;
	/* keeps track of where we are in chanlist as for munging */
	unsigned int munge_chan;
	/* number of bytes that have been munged */
	unsigned int munge_count;
	/* buffer marker for munging */
	unsigned int munge_ptr;

	unsigned int events;	/* events that have occurred */

	comedi_cmd cmd;

	wait_queue_head_t wait_head;

	/* callback stuff */
	unsigned int cb_mask;
	int (*cb_func) (unsigned int flags, void *);
	void *cb_arg;

	int (*inttrig) (struct comedi_device *dev, struct comedi_subdevice *s,
			unsigned int x);
};

struct comedi_driver {
	struct comedi_driver *next;

	const char *driver_name;
	struct module *module;
	int (*attach) (struct comedi_device *, comedi_devconfig *);
	int (*detach) (struct comedi_device *);

	/* number of elements in board_name and board_id arrays */
	unsigned int num_names;
	const char *const *board_name;
	/* offset in bytes from one board name pointer to the next */
	int offset;
};

struct comedi_device {
	int use_count;
	struct comedi_driver *driver;
	void *private;

	device_create_result_type *class_dev;
	int minor;
	/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
	 * for subdevices that have async_dma_dir set to something other than
	 * DMA_NONE */
	struct device *hw_dev;

	const char *board_name;
	const void *board_ptr;
	int attached;
	int rt;
	spinlock_t spinlock;
	struct mutex mutex;
	int in_request_module;

	int n_subdevices;
	struct comedi_subdevice *subdevices;

	/* dumb */
	unsigned long iobase;
	unsigned int irq;

	struct comedi_subdevice *read_subdev;
	struct comedi_subdevice *write_subdev;

	struct fasync_struct *async_queue;

	void (*open) (struct comedi_device *dev);
	void (*close) (struct comedi_device *dev);
};

struct comedi_device_file_info {
	struct comedi_device *device;
	struct comedi_subdevice *read_subdevice;
	struct comedi_subdevice *write_subdevice;
};

#ifdef CONFIG_COMEDI_DEBUG
extern int comedi_debug;
#else
static const int comedi_debug;
#endif

/*
 * function prototypes
 */

void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s);
void comedi_error(const struct comedi_device *dev, const char *s);

/* we can expand the number of bits used to encode devices/subdevices into
 the minor number soon, after more distros support > 8 bit minor numbers
 (like after Debian Etch gets released) */
enum comedi_minor_bits {
	COMEDI_DEVICE_MINOR_MASK = 0xf,
	COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
};
static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;

struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor);

static inline struct comedi_subdevice *comedi_get_read_subdevice(
				const struct comedi_device_file_info *info)
{
	if (info->read_subdevice)
		return info->read_subdevice;
	if (info->device == NULL)
		return NULL;
	return info->device->read_subdev;
}

static inline struct comedi_subdevice *comedi_get_write_subdevice(
				const struct comedi_device_file_info *info)
{
	if (info->write_subdevice)
		return info->write_subdevice;
	if (info->device == NULL)
		return NULL;
	return info->device->write_subdev;
}

void comedi_device_detach(struct comedi_device *dev);
int comedi_device_attach(struct comedi_device *dev, comedi_devconfig *it);
int comedi_driver_register(struct comedi_driver *);
int comedi_driver_unregister(struct comedi_driver *);

void init_polling(void);
void cleanup_polling(void);
void start_polling(struct comedi_device *);
void stop_polling(struct comedi_device *);

int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long
	new_size);

#ifdef CONFIG_PROC_FS
void comedi_proc_init(void);
void comedi_proc_cleanup(void);
#else
static inline void comedi_proc_init(void)
{
}
static inline void comedi_proc_cleanup(void)
{
}
#endif

/* subdevice runflags */
enum subdevice_runflags {
	SRF_USER = 0x00000001,
	SRF_RT = 0x00000002,
	/* indicates an COMEDI_CB_ERROR event has occurred since the last
	 * command was started */
	SRF_ERROR = 0x00000004,
	SRF_RUNNING = 0x08000000
};

/*
   various internal comedi functions
 */

int do_rangeinfo_ioctl(struct comedi_device *dev, comedi_rangeinfo *arg);
int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist);
void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask,
	unsigned bits);
unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);
int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s,
	comedi_insn *insn, unsigned int *data);

/* range stuff */

#define RANGE(a, b)		{(a)*1e6, (b)*1e6, 0}
#define RANGE_ext(a, b)		{(a)*1e6, (b)*1e6, RF_EXTERNAL}
#define RANGE_mA(a, b)		{(a)*1e6, (b)*1e6, UNIT_mA}
#define RANGE_unitless(a, b)	{(a)*1e6, (b)*1e6, 0}	/* XXX */
#define BIP_RANGE(a)		{-(a)*1e6, (a)*1e6, 0}
#define UNI_RANGE(a)		{0, (a)*1e6, 0}

extern const struct comedi_lrange range_bipolar10;
extern const struct comedi_lrange range_bipolar5;
extern const struct comedi_lrange range_bipolar2_5;
extern const struct comedi_lrange range_unipolar10;
extern const struct comedi_lrange range_unipolar5;
extern const struct comedi_lrange range_unknown;

#define range_digital		range_unipolar5

#if __GNUC__ >= 3
#define GCC_ZERO_LENGTH_ARRAY
#else
#define GCC_ZERO_LENGTH_ARRAY 0
#endif

struct comedi_lrange {
	int length;
	comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
};

/* some silly little inline functions */

static inline int alloc_subdevices(struct comedi_device *dev,
				   unsigned int num_subdevices)
{
	unsigned i;

	dev->n_subdevices = num_subdevices;
	dev->subdevices =
		kcalloc(num_subdevices, sizeof(struct comedi_subdevice), GFP_KERNEL);
	if (!dev->subdevices)
		return -ENOMEM;
	for (i = 0; i < num_subdevices; ++i) {
		dev->subdevices[i].device = dev;
		dev->subdevices[i].async_dma_dir = DMA_NONE;
		spin_lock_init(&dev->subdevices[i].spin_lock);
		dev->subdevices[i].minor = -1;
	}
	return 0;
}

static inline int alloc_private(struct comedi_device *dev, int size)
{
	dev->private = kzalloc(size, GFP_KERNEL);
	if (!dev->private)
		return -ENOMEM;
	return 0;
}

static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
{
	if (subd->subdev_flags & SDF_LSAMPL)
		return sizeof(unsigned int);
	else
		return sizeof(short);
}

/* must be used in attach to set dev->hw_dev if you wish to dma directly
into comedi's buffer */
static inline void comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev)
{
	if (dev->hw_dev)
		put_device(dev->hw_dev);

	dev->hw_dev = hw_dev;
	if (dev->hw_dev) {
		dev->hw_dev = get_device(dev->hw_dev);
		BUG_ON(dev->hw_dev == NULL);
	}
}

int comedi_buf_put(struct comedi_async *async, short x);
int comedi_buf_get(struct comedi_async *async, short *x);

unsigned int comedi_buf_write_n_available(struct comedi_async *async);
unsigned int comedi_buf_write_alloc(struct comedi_async *async, unsigned int nbytes);
unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
	unsigned int nbytes);
unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
unsigned int comedi_buf_read_n_available(struct comedi_async *async);
void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
	const void *source, unsigned int num_bytes);
void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
	void *destination, unsigned int num_bytes);
static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
{
	return async->buf_write_alloc_count - async->buf_write_count;
}
static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
{
	return async->buf_read_alloc_count - async->buf_read_count;
}

void comedi_reset_async_buf(struct comedi_async *async);

static inline void *comedi_aux_data(int options[], int n)
{
	unsigned long address;
	unsigned long addressLow;
	int bit_shift;
	if (sizeof(int) >= sizeof(void *))
		address = options[COMEDI_DEVCONF_AUX_DATA_LO];
	else {
		address = options[COMEDI_DEVCONF_AUX_DATA_HI];
		bit_shift = sizeof(int) * 8;
		address <<= bit_shift;
		addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
		addressLow &= (1UL << bit_shift) - 1;
		address |= addressLow;
	}
	if (n >= 1)
		address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
	if (n >= 2)
		address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
	if (n >= 3)
		address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
	BUG_ON(n > 3);
	return (void *)address;
}

int comedi_alloc_board_minor(struct device *hardware_device);
void comedi_free_board_minor(unsigned minor);
int comedi_alloc_subdevice_minor(struct comedi_device *dev, struct comedi_subdevice *s);
void comedi_free_subdevice_minor(struct comedi_subdevice *s);
int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name);
void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
struct usb_device;	/* forward declaration */
int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name);
void comedi_usb_auto_unconfig(struct usb_device *usbdev);

#include "comedi_rt.h"

#endif /* _COMEDIDEV_H */
Commit	Line	Data
ed9eccbe DS	1	/*
	2	include/linux/comedidev.h
	3	header file for kernel-only structures, variables, and constants
	4
	5	COMEDI - Linux Control and Measurement Device Interface
	6	Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21
	22	*/
	23
	24	#ifndef _COMEDIDEV_H
	25	#define _COMEDIDEV_H
	26
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
ed9eccbe DS	29	#include <linux/kdev_t.h>
	30	#include <linux/slab.h>
	31	#include <linux/errno.h>
	32	#include <linux/spinlock.h>
	33	#include <linux/mutex.h>
	34	#include <linux/wait.h>
	35	#include <linux/mm.h>
	36	#include <linux/init.h>
	37	#include <linux/vmalloc.h>
74b847f4	38	#include "interrupt.h"
ed9eccbe	39	#include <linux/dma-mapping.h>
e0dcef71 GKH	40	#include <linux/uaccess.h>
e0dcef71 GKH	41	#include <linux/io.h>
ed9eccbe DS	42
	43	#include "comedi.h"
	44
e0dcef71 GKH	45	#define DPRINTK(format, args...) do { \
	46	if (comedi_debug) \
	47	printk(KERN_DEBUG "comedi: " format , ## args); \
	48	} while (0)
ed9eccbe	49
e0dcef71 GKH	50	#define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
e0dcef71 GKH	51	#define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION)
ed9eccbe DS	52	#define COMEDI_RELEASE VERSION
	53
	54	#define COMEDI_INITCLEANUP_NOMODULE(x) \
	55	static int __init x ## _init_module(void) \
51b713a6	56	{return comedi_driver_register(&(x)); } \
ed9eccbe	57	static void __exit x ## _cleanup_module(void) \
51b713a6	58	{comedi_driver_unregister(&(x)); } \
ed9eccbe DS	59	module_init(x ## _init_module); \
	60	module_exit(x ## _cleanup_module); \
	61
	62	#define COMEDI_MODULE_MACROS \
	63	MODULE_AUTHOR("Comedi http://www.comedi.org"); \
	64	MODULE_DESCRIPTION("Comedi low-level driver"); \
	65	MODULE_LICENSE("GPL"); \
	66
	67	#define COMEDI_INITCLEANUP(x) \
	68	COMEDI_MODULE_MACROS \
	69	COMEDI_INITCLEANUP_NOMODULE(x)
	70
	71	#define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \
	72	static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \
	73	const struct pci_device_id *ent) \
	74	{ \
	75	return comedi_pci_auto_config(dev, comedi_driver.driver_name); \
	76	} \
	77	static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \
	78	{ \
	79	comedi_pci_auto_unconfig(dev); \
	80	} \
	81	static struct pci_driver comedi_driver ## _pci_driver = \
	82	{ \
	83	.id_table = pci_id_table, \
e0dcef71 GKH	84	.probe = &comedi_driver ## _pci_probe, \
e0dcef71 GKH	85	.remove = __devexit_p(&comedi_driver ## _pci_remove) \
ed9eccbe DS	86	}; \
	87	static int __init comedi_driver ## _init_module(void) \
	88	{ \
	89	int retval; \
e0dcef71 GKH	90	retval = comedi_driver_register(&comedi_driver); \
	91	if (retval < 0) \
	92	return retval; \
	93	comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \
	94	return pci_register_driver(&comedi_driver ## _pci_driver); \
ed9eccbe DS	95	} \
	96	static void __exit comedi_driver ## _cleanup_module(void) \
	97	{ \
e0dcef71 GKH	98	pci_unregister_driver(&comedi_driver ## _pci_driver); \
e0dcef71 GKH	99	comedi_driver_unregister(&comedi_driver); \
ed9eccbe DS	100	} \
	101	module_init(comedi_driver ## _init_module); \
	102	module_exit(comedi_driver ## _cleanup_module);
	103
	104	#define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \
	105	COMEDI_MODULE_MACROS \
	106	COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table)
	107
	108	#define PCI_VENDOR_ID_INOVA 0x104c
	109	#define PCI_VENDOR_ID_NATINST 0x1093
	110	#define PCI_VENDOR_ID_DATX 0x1116
	111	#define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
	112	#define PCI_VENDOR_ID_ADVANTECH 0x13fe
	113	#define PCI_VENDOR_ID_RTD 0x1435
	114	#define PCI_VENDOR_ID_AMPLICON 0x14dc
	115	#define PCI_VENDOR_ID_ADLINK 0x144a
	116	#define PCI_VENDOR_ID_ICP 0x104c
	117	#define PCI_VENDOR_ID_CONTEC 0x1221
	118	#define PCI_VENDOR_ID_MEILHAUS 0x1402
	119
	120	#define COMEDI_NUM_MINORS 0x100
ed9eccbe DS	121	#define COMEDI_NUM_BOARD_MINORS 0x30
	122	#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS
	123
ed9eccbe DS	124	typedef struct device device_create_result_type;
	125
	126	#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
	127	device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)
	128
34c43922	129	struct comedi_subdevice {
71b5f4f1	130	struct comedi_device *device;
ed9eccbe DS	131	int type;
	132	int n_chan;
	133	volatile int subdev_flags;
	134	int len_chanlist; /* maximum length of channel/gain list */
	135
	136	void *private;
	137
d163679c	138	struct comedi_async *async;
ed9eccbe DS	139
	140	void *lock;
	141	void *busy;
	142	unsigned runflags;
	143	spinlock_t spin_lock;
	144
	145	int io_bits;
	146
790c5541 BP	147	unsigned int maxdata; /* if maxdata==0, use list */
790c5541 BP	148	const unsigned int maxdata_list; / list is channel specific */
ed9eccbe DS	149
	150	unsigned int flags;
	151	const unsigned int *flaglist;
	152
	153	unsigned int settling_time_0;
	154
9ced1de6 BP	155	const struct comedi_lrange *range_table;
9ced1de6 BP	156	const struct comedi_lrange const range_table_list;
ed9eccbe DS	157
	158	unsigned int chanlist; / driver-owned chanlist (not used) */
	159
34c43922	160	int (insn_read) (struct comedi_device , struct comedi_subdevice , comedi_insn ,
790c5541	161	unsigned int *);
34c43922	162	int (insn_write) (struct comedi_device , struct comedi_subdevice , comedi_insn ,
790c5541	163	unsigned int *);
34c43922	164	int (insn_bits) (struct comedi_device , struct comedi_subdevice , comedi_insn ,
790c5541	165	unsigned int *);
34c43922	166	int (insn_config) (struct comedi_device , struct comedi_subdevice , comedi_insn ,
790c5541	167	unsigned int *);
ed9eccbe	168
34c43922 BP	169	int (do_cmd) (struct comedi_device , struct comedi_subdevice *);
	170	int (do_cmdtest) (struct comedi_device , struct comedi_subdevice , comedi_cmd );
	171	int (poll) (struct comedi_device , struct comedi_subdevice *);
	172	int (cancel) (struct comedi_device , struct comedi_subdevice *);
	173	/* int (do_lock)(struct comedi_device ,struct comedi_subdevice ); /
	174	/* int (do_unlock)(struct comedi_device ,struct comedi_subdevice ); /
ed9eccbe DS	175
ed9eccbe DS	176	/* called when the buffer changes */
34c43922	177	int (buf_change) (struct comedi_device dev, struct comedi_subdevice *s,
ed9eccbe DS	178	unsigned long new_size);
ed9eccbe DS	179
34c43922	180	void (munge) (struct comedi_device dev, struct comedi_subdevice s, void data,
ed9eccbe DS	181	unsigned int num_bytes, unsigned int start_chan_index);
	182	enum dma_data_direction async_dma_dir;
	183
	184	unsigned int state;
	185
	186	device_create_result_type *class_dev;
	187	int minor;
	188	};
	189
	190	struct comedi_buf_page {
	191	void *virt_addr;
	192	dma_addr_t dma_addr;
	193	};
	194
d163679c	195	struct comedi_async {
34c43922	196	struct comedi_subdevice *subdevice;
ed9eccbe DS	197
	198	void prealloc_buf; / pre-allocated buffer */
	199	unsigned int prealloc_bufsz; /* buffer size, in bytes */
	200	struct comedi_buf_page buf_page_list; / virtual and dma address of each page */
	201	unsigned n_buf_pages; /* num elements in buf_page_list */
	202
	203	unsigned int max_bufsize; /* maximum buffer size, bytes */
	204	unsigned int mmap_count; /* current number of mmaps of prealloc_buf */
	205
	206	unsigned int buf_write_count; /* byte count for writer (write completed) */
	207	unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */
	208	unsigned int buf_read_count; /* byte count for reader (read completed) */
	209	unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */
	210
	211	unsigned int buf_write_ptr; /* buffer marker for writer */
	212	unsigned int buf_read_ptr; /* buffer marker for reader */
	213
	214	unsigned int cur_chan; /* useless channel marker for interrupt */
	215	/* number of bytes that have been received for current scan */
	216	unsigned int scan_progress;
	217	/* keeps track of where we are in chanlist as for munging */
	218	unsigned int munge_chan;
	219	/* number of bytes that have been munged */
	220	unsigned int munge_count;
	221	/* buffer marker for munging */
	222	unsigned int munge_ptr;
	223
	224	unsigned int events; /* events that have occurred */
	225
	226	comedi_cmd cmd;
	227
	228	wait_queue_head_t wait_head;
	229
e0dcef71	230	/* callback stuff */
ed9eccbe DS	231	unsigned int cb_mask;
	232	int (cb_func) (unsigned int flags, void );
	233	void *cb_arg;
	234
34c43922	235	int (inttrig) (struct comedi_device dev, struct comedi_subdevice *s,
e0dcef71	236	unsigned int x);
ed9eccbe DS	237	};
ed9eccbe DS	238
139dfbdf BP	239	struct comedi_driver {
139dfbdf BP	240	struct comedi_driver *next;
ed9eccbe DS	241
	242	const char *driver_name;
	243	struct module *module;
71b5f4f1 BP	244	int (attach) (struct comedi_device , comedi_devconfig *);
71b5f4f1 BP	245	int (detach) (struct comedi_device );
ed9eccbe DS	246
	247	/* number of elements in board_name and board_id arrays */
	248	unsigned int num_names;
	249	const char const board_name;
	250	/* offset in bytes from one board name pointer to the next */
	251	int offset;
	252	};
	253
71b5f4f1	254	struct comedi_device {
ed9eccbe	255	int use_count;
139dfbdf	256	struct comedi_driver *driver;
ed9eccbe DS	257	void *private;
	258
	259	device_create_result_type *class_dev;
	260	int minor;
e0dcef71 GKH	261	/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
	262	* for subdevices that have async_dma_dir set to something other than
	263	* DMA_NONE */
ed9eccbe DS	264	struct device *hw_dev;
	265
	266	const char *board_name;
	267	const void *board_ptr;
	268	int attached;
	269	int rt;
	270	spinlock_t spinlock;
	271	struct mutex mutex;
	272	int in_request_module;
	273
	274	int n_subdevices;
34c43922	275	struct comedi_subdevice *subdevices;
ed9eccbe DS	276
	277	/* dumb */
	278	unsigned long iobase;
	279	unsigned int irq;
	280
34c43922 BP	281	struct comedi_subdevice *read_subdev;
34c43922 BP	282	struct comedi_subdevice *write_subdev;
ed9eccbe DS	283
	284	struct fasync_struct *async_queue;
	285
71b5f4f1 BP	286	void (open) (struct comedi_device dev);
71b5f4f1 BP	287	void (close) (struct comedi_device dev);
ed9eccbe DS	288	};
	289
	290	struct comedi_device_file_info {
71b5f4f1	291	struct comedi_device *device;
34c43922 BP	292	struct comedi_subdevice *read_subdevice;
34c43922 BP	293	struct comedi_subdevice *write_subdevice;
ed9eccbe DS	294	};
	295
	296	#ifdef CONFIG_COMEDI_DEBUG
	297	extern int comedi_debug;
	298	#else
e0dcef71	299	static const int comedi_debug;
ed9eccbe DS	300	#endif
	301
	302	/*
	303	* function prototypes
	304	*/
	305
34c43922	306	void comedi_event(struct comedi_device dev, struct comedi_subdevice s);
71b5f4f1	307	void comedi_error(const struct comedi_device dev, const char s);
ed9eccbe DS	308
	309	/* we can expand the number of bits used to encode devices/subdevices into
	310	the minor number soon, after more distros support > 8 bit minor numbers
	311	(like after Debian Etch gets released) */
	312	enum comedi_minor_bits {
	313	COMEDI_DEVICE_MINOR_MASK = 0xf,
	314	COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
	315	};
	316	static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
	317	static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
	318
e0dcef71	319	struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor);
ed9eccbe	320
34c43922	321	static inline struct comedi_subdevice *comedi_get_read_subdevice(
e0dcef71	322	const struct comedi_device_file_info *info)
ed9eccbe	323	{
e0dcef71 GKH	324	if (info->read_subdevice)
	325	return info->read_subdevice;
	326	if (info->device == NULL)
	327	return NULL;
ed9eccbe DS	328	return info->device->read_subdev;
	329	}
	330
34c43922	331	static inline struct comedi_subdevice *comedi_get_write_subdevice(
e0dcef71	332	const struct comedi_device_file_info *info)
ed9eccbe	333	{
e0dcef71 GKH	334	if (info->write_subdevice)
	335	return info->write_subdevice;
	336	if (info->device == NULL)
	337	return NULL;
ed9eccbe DS	338	return info->device->write_subdev;
	339	}
	340
71b5f4f1 BP	341	void comedi_device_detach(struct comedi_device *dev);
71b5f4f1 BP	342	int comedi_device_attach(struct comedi_device dev, comedi_devconfig it);
139dfbdf BP	343	int comedi_driver_register(struct comedi_driver *);
139dfbdf BP	344	int comedi_driver_unregister(struct comedi_driver *);
ed9eccbe DS	345
	346	void init_polling(void);
	347	void cleanup_polling(void);
71b5f4f1 BP	348	void start_polling(struct comedi_device *);
71b5f4f1 BP	349	void stop_polling(struct comedi_device *);
ed9eccbe	350
34c43922	351	int comedi_buf_alloc(struct comedi_device dev, struct comedi_subdevice s, unsigned long
ed9eccbe DS	352	new_size);
	353
	354	#ifdef CONFIG_PROC_FS
	355	void comedi_proc_init(void);
	356	void comedi_proc_cleanup(void);
	357	#else
	358	static inline void comedi_proc_init(void)
	359	{
	360	}
	361	static inline void comedi_proc_cleanup(void)
	362	{
	363	}
	364	#endif
	365
	366	/* subdevice runflags */
	367	enum subdevice_runflags {
	368	SRF_USER = 0x00000001,
	369	SRF_RT = 0x00000002,
e0dcef71 GKH	370	/* indicates an COMEDI_CB_ERROR event has occurred since the last
e0dcef71 GKH	371	* command was started */
ed9eccbe DS	372	SRF_ERROR = 0x00000004,
	373	SRF_RUNNING = 0x08000000
	374	};
	375
	376	/*
	377	various internal comedi functions
	378	*/
	379
71b5f4f1	380	int do_rangeinfo_ioctl(struct comedi_device dev, comedi_rangeinfo arg);
34c43922 BP	381	int check_chanlist(struct comedi_subdevice s, int n, unsigned int chanlist);
34c43922 BP	382	void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask,
ed9eccbe	383	unsigned bits);
34c43922 BP	384	unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);
34c43922 BP	385	int insn_inval(struct comedi_device dev, struct comedi_subdevice s,
790c5541	386	comedi_insn insn, unsigned int data);
ed9eccbe DS	387
	388	/* range stuff */
	389
e0dcef71 GKH	390	#define RANGE(a, b) {(a)1e6, (b)1e6, 0}
	391	#define RANGE_ext(a, b) {(a)1e6, (b)1e6, RF_EXTERNAL}
	392	#define RANGE_mA(a, b) {(a)1e6, (b)1e6, UNIT_mA}
	393	#define RANGE_unitless(a, b) {(a)1e6, (b)1e6, 0} /* XXX */
	394	#define BIP_RANGE(a) {-(a)1e6, (a)1e6, 0}
	395	#define UNI_RANGE(a) {0, (a)*1e6, 0}
ed9eccbe	396
9ced1de6 BP	397	extern const struct comedi_lrange range_bipolar10;
	398	extern const struct comedi_lrange range_bipolar5;
	399	extern const struct comedi_lrange range_bipolar2_5;
	400	extern const struct comedi_lrange range_unipolar10;
	401	extern const struct comedi_lrange range_unipolar5;
	402	extern const struct comedi_lrange range_unknown;
ed9eccbe DS	403
	404	#define range_digital range_unipolar5
	405
	406	#if __GNUC__ >= 3
	407	#define GCC_ZERO_LENGTH_ARRAY
	408	#else
	409	#define GCC_ZERO_LENGTH_ARRAY 0
	410	#endif
	411
9ced1de6	412	struct comedi_lrange {
ed9eccbe DS	413	int length;
	414	comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
	415	};
	416
	417	/* some silly little inline functions */
	418
71b5f4f1	419	static inline int alloc_subdevices(struct comedi_device *dev,
e0dcef71	420	unsigned int num_subdevices)
ed9eccbe DS	421	{
	422	unsigned i;
	423
	424	dev->n_subdevices = num_subdevices;
	425	dev->subdevices =
34c43922	426	kcalloc(num_subdevices, sizeof(struct comedi_subdevice), GFP_KERNEL);
ed9eccbe DS	427	if (!dev->subdevices)
	428	return -ENOMEM;
	429	for (i = 0; i < num_subdevices; ++i) {
	430	dev->subdevices[i].device = dev;
	431	dev->subdevices[i].async_dma_dir = DMA_NONE;
	432	spin_lock_init(&dev->subdevices[i].spin_lock);
	433	dev->subdevices[i].minor = -1;
	434	}
	435	return 0;
	436	}
	437
71b5f4f1	438	static inline int alloc_private(struct comedi_device *dev, int size)
ed9eccbe DS	439	{
	440	dev->private = kzalloc(size, GFP_KERNEL);
	441	if (!dev->private)
	442	return -ENOMEM;
	443	return 0;
	444	}
	445
34c43922	446	static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
ed9eccbe DS	447	{
ed9eccbe DS	448	if (subd->subdev_flags & SDF_LSAMPL)
790c5541	449	return sizeof(unsigned int);
ed9eccbe	450	else
790c5541	451	return sizeof(short);
ed9eccbe DS	452	}
	453
	454	/* must be used in attach to set dev->hw_dev if you wish to dma directly
	455	into comedi's buffer */
71b5f4f1	456	static inline void comedi_set_hw_dev(struct comedi_device dev, struct device hw_dev)
ed9eccbe	457	{
e0dcef71	458	if (dev->hw_dev)
ed9eccbe	459	put_device(dev->hw_dev);
e0dcef71	460
ed9eccbe DS	461	dev->hw_dev = hw_dev;
	462	if (dev->hw_dev) {
	463	dev->hw_dev = get_device(dev->hw_dev);
	464	BUG_ON(dev->hw_dev == NULL);
	465	}
	466	}
	467
d163679c BP	468	int comedi_buf_put(struct comedi_async *async, short x);
d163679c BP	469	int comedi_buf_get(struct comedi_async async, short x);
ed9eccbe	470
d163679c BP	471	unsigned int comedi_buf_write_n_available(struct comedi_async *async);
	472	unsigned int comedi_buf_write_alloc(struct comedi_async *async, unsigned int nbytes);
	473	unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
ed9eccbe	474	unsigned int nbytes);
d163679c BP	475	unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
	476	unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
	477	unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
	478	unsigned int comedi_buf_read_n_available(struct comedi_async *async);
	479	void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
ed9eccbe	480	const void *source, unsigned int num_bytes);
d163679c	481	void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
ed9eccbe	482	void *destination, unsigned int num_bytes);
d163679c	483	static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
ed9eccbe DS	484	{
	485	return async->buf_write_alloc_count - async->buf_write_count;
	486	}
d163679c	487	static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
ed9eccbe DS	488	{
	489	return async->buf_read_alloc_count - async->buf_read_count;
	490	}
	491
d163679c	492	void comedi_reset_async_buf(struct comedi_async *async);
ed9eccbe DS	493
	494	static inline void *comedi_aux_data(int options[], int n)
	495	{
	496	unsigned long address;
	497	unsigned long addressLow;
	498	int bit_shift;
	499	if (sizeof(int) >= sizeof(void *))
	500	address = options[COMEDI_DEVCONF_AUX_DATA_LO];
	501	else {
	502	address = options[COMEDI_DEVCONF_AUX_DATA_HI];
	503	bit_shift = sizeof(int) * 8;
	504	address <<= bit_shift;
	505	addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
	506	addressLow &= (1UL << bit_shift) - 1;
	507	address \|= addressLow;
	508	}
	509	if (n >= 1)
	510	address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
	511	if (n >= 2)
	512	address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
	513	if (n >= 3)
	514	address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
	515	BUG_ON(n > 3);
	516	return (void *)address;
	517	}
	518
	519	int comedi_alloc_board_minor(struct device *hardware_device);
	520	void comedi_free_board_minor(unsigned minor);
34c43922 BP	521	int comedi_alloc_subdevice_minor(struct comedi_device dev, struct comedi_subdevice s);
34c43922 BP	522	void comedi_free_subdevice_minor(struct comedi_subdevice *s);
ed9eccbe DS	523	int comedi_pci_auto_config(struct pci_dev pcidev, const char board_name);
ed9eccbe DS	524	void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
c28264da BP	525	struct usb_device; /* forward declaration */
	526	int comedi_usb_auto_config(struct usb_device usbdev, const char board_name);
	527	void comedi_usb_auto_unconfig(struct usb_device *usbdev);
ed9eccbe	528
ed9eccbe	529	#include "comedi_rt.h"
ed9eccbe DS	530
ed9eccbe DS	531	#endif /* _COMEDIDEV_H */