[GitHub/mt8127/android_kernel_alcatel_ttab.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/delay.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 <linux/dma-mapping.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/timer.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 PCI_VENDOR_ID_ADLINK		0x144a
#define PCI_VENDOR_ID_ICP		0x104c
#define PCI_VENDOR_ID_CONTEC		0x1221

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

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

	int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *);
	int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *,
			   struct 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;

	struct device *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 */
	/* virtual and dma address of each page */
	struct comedi_buf_page *buf_page_list;
	unsigned n_buf_pages;	/* num elements in buf_page_list */

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

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

	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 */

	struct 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 *, struct 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;

	struct device *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;
	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;

	int (*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,
			 struct 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 *);

#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
};

int comedi_check_chanlist(struct comedi_subdevice *s,
			  int n,
			  unsigned int *chanlist);
unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);

/* 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}
#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;
	struct 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;
}

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_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);

#ifdef CONFIG_COMEDI_PCI_DRIVERS
#define CONFIG_COMEDI_PCI
#endif
#ifdef CONFIG_COMEDI_PCI_DRIVERS_MODULE
#define CONFIG_COMEDI_PCI
#endif
#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
#define CONFIG_COMEDI_PCMCIA
#endif
#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS_MODULE
#define CONFIG_COMEDI_PCMCIA
#endif

#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>
ed9eccbe DS	30	#include <linux/slab.h>
f9c51375	31	#include <linux/delay.h>
ed9eccbe DS	32	#include <linux/errno.h>
	33	#include <linux/spinlock.h>
	34	#include <linux/mutex.h>
	35	#include <linux/wait.h>
	36	#include <linux/mm.h>
	37	#include <linux/init.h>
	38	#include <linux/vmalloc.h>
ed9eccbe	39	#include <linux/dma-mapping.h>
e0dcef71 GKH	40	#include <linux/uaccess.h>
e0dcef71 GKH	41	#include <linux/io.h>
c7a5d707	42	#include <linux/timer.h>
ed9eccbe DS	43
	44	#include "comedi.h"
	45
e0dcef71 GKH	46	#define DPRINTK(format, args...) do { \
	47	if (comedi_debug) \
	48	printk(KERN_DEBUG "comedi: " format , ## args); \
	49	} while (0)
ed9eccbe	50
e0dcef71	51	#define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
62eeae93 SW	52	#define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, \
62eeae93 SW	53	COMEDI_MINORVERSION, COMEDI_MICROVERSION)
ed9eccbe DS	54	#define COMEDI_RELEASE VERSION
ed9eccbe DS	55
ed9eccbe DS	56	#define PCI_VENDOR_ID_ADLINK 0x144a
	57	#define PCI_VENDOR_ID_ICP 0x104c
	58	#define PCI_VENDOR_ID_CONTEC 0x1221
ed9eccbe DS	59
ed9eccbe DS	60	#define COMEDI_NUM_MINORS 0x100
ed9eccbe DS	61	#define COMEDI_NUM_BOARD_MINORS 0x30
	62	#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS
	63
ed9eccbe DS	64	#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
	65	device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)
	66
34c43922	67	struct comedi_subdevice {
71b5f4f1	68	struct comedi_device *device;
ed9eccbe DS	69	int type;
ed9eccbe DS	70	int n_chan;
baf22b64	71	int subdev_flags;
ed9eccbe DS	72	int len_chanlist; /* maximum length of channel/gain list */
	73
	74	void *private;
	75
d163679c	76	struct comedi_async *async;
ed9eccbe DS	77
	78	void *lock;
	79	void *busy;
	80	unsigned runflags;
	81	spinlock_t spin_lock;
	82
	83	int io_bits;
	84
790c5541 BP	85	unsigned int maxdata; /* if maxdata==0, use list */
790c5541 BP	86	const unsigned int maxdata_list; / list is channel specific */
ed9eccbe DS	87
	88	unsigned int flags;
	89	const unsigned int *flaglist;
	90
	91	unsigned int settling_time_0;
	92
9ced1de6 BP	93	const struct comedi_lrange *range_table;
9ced1de6 BP	94	const struct comedi_lrange const range_table_list;
ed9eccbe DS	95
	96	unsigned int chanlist; / driver-owned chanlist (not used) */
	97
0a85b6f0 MT	98	int (insn_read) (struct comedi_device , struct comedi_subdevice *,
	99	struct comedi_insn , unsigned int );
	100	int (insn_write) (struct comedi_device , struct comedi_subdevice *,
	101	struct comedi_insn , unsigned int );
	102	int (insn_bits) (struct comedi_device , struct comedi_subdevice *,
	103	struct comedi_insn , unsigned int );
	104	int (insn_config) (struct comedi_device , struct comedi_subdevice *,
	105	struct comedi_insn , unsigned int );
ed9eccbe	106
34c43922	107	int (do_cmd) (struct comedi_device , struct comedi_subdevice *);
0a85b6f0 MT	108	int (do_cmdtest) (struct comedi_device , struct comedi_subdevice *,
0a85b6f0 MT	109	struct comedi_cmd *);
34c43922 BP	110	int (poll) (struct comedi_device , struct comedi_subdevice *);
34c43922 BP	111	int (cancel) (struct comedi_device , struct comedi_subdevice *);
62eeae93 SW	112	/* int (do_lock)(struct comedi_device , struct comedi_subdevice ); /
	113	/* int (do_unlock)(struct comedi_device , \
	114	struct comedi_subdevice ); /
ed9eccbe DS	115
ed9eccbe DS	116	/* called when the buffer changes */
62eeae93 SW	117	int (buf_change) (struct comedi_device dev,
62eeae93 SW	118	struct comedi_subdevice *s, unsigned long new_size);
ed9eccbe	119
62eeae93	120	void (munge) (struct comedi_device dev, struct comedi_subdevice *s,
0a85b6f0 MT	121	void *data, unsigned int num_bytes,
0a85b6f0 MT	122	unsigned int start_chan_index);
ed9eccbe DS	123	enum dma_data_direction async_dma_dir;
	124
	125	unsigned int state;
	126
0bfbbe8f	127	struct device *class_dev;
ed9eccbe DS	128	int minor;
	129	};
	130
	131	struct comedi_buf_page {
	132	void *virt_addr;
	133	dma_addr_t dma_addr;
	134	};
	135
d163679c	136	struct comedi_async {
34c43922	137	struct comedi_subdevice *subdevice;
ed9eccbe DS	138
	139	void prealloc_buf; / pre-allocated buffer */
	140	unsigned int prealloc_bufsz; /* buffer size, in bytes */
62eeae93 SW	141	/* virtual and dma address of each page */
62eeae93 SW	142	struct comedi_buf_page *buf_page_list;
ed9eccbe DS	143	unsigned n_buf_pages; /* num elements in buf_page_list */
	144
	145	unsigned int max_bufsize; /* maximum buffer size, bytes */
62eeae93 SW	146	/* current number of mmaps of prealloc_buf */
	147	unsigned int mmap_count;
	148
	149	/* byte count for writer (write completed) */
	150	unsigned int buf_write_count;
	151	/* byte count for writer (allocated for writing) */
	152	unsigned int buf_write_alloc_count;
	153	/* byte count for reader (read completed) */
	154	unsigned int buf_read_count;
	155	/* byte count for reader (allocated for reading) */
	156	unsigned int buf_read_alloc_count;
ed9eccbe DS	157
	158	unsigned int buf_write_ptr; /* buffer marker for writer */
	159	unsigned int buf_read_ptr; /* buffer marker for reader */
	160
	161	unsigned int cur_chan; /* useless channel marker for interrupt */
	162	/* number of bytes that have been received for current scan */
	163	unsigned int scan_progress;
	164	/* keeps track of where we are in chanlist as for munging */
	165	unsigned int munge_chan;
	166	/* number of bytes that have been munged */
	167	unsigned int munge_count;
	168	/* buffer marker for munging */
	169	unsigned int munge_ptr;
	170
	171	unsigned int events; /* events that have occurred */
	172
ea6d0d4c	173	struct comedi_cmd cmd;
ed9eccbe DS	174
	175	wait_queue_head_t wait_head;
	176
e0dcef71	177	/* callback stuff */
ed9eccbe DS	178	unsigned int cb_mask;
	179	int (cb_func) (unsigned int flags, void );
	180	void *cb_arg;
	181
62eeae93	182	int (inttrig) (struct comedi_device dev, struct comedi_subdevice *s,
e0dcef71	183	unsigned int x);
ed9eccbe DS	184	};
ed9eccbe DS	185
139dfbdf BP	186	struct comedi_driver {
139dfbdf BP	187	struct comedi_driver *next;
ed9eccbe DS	188
	189	const char *driver_name;
	190	struct module *module;
0707bb04	191	int (attach) (struct comedi_device , struct comedi_devconfig *);
71b5f4f1	192	int (detach) (struct comedi_device );
ed9eccbe DS	193
	194	/* number of elements in board_name and board_id arrays */
	195	unsigned int num_names;
	196	const char const board_name;
	197	/* offset in bytes from one board name pointer to the next */
	198	int offset;
	199	};
	200
71b5f4f1	201	struct comedi_device {
ed9eccbe	202	int use_count;
139dfbdf	203	struct comedi_driver *driver;
ed9eccbe DS	204	void *private;
ed9eccbe DS	205
0bfbbe8f	206	struct device *class_dev;
ed9eccbe	207	int minor;
e0dcef71 GKH	208	/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
	209	* for subdevices that have async_dma_dir set to something other than
	210	* DMA_NONE */
ed9eccbe DS	211	struct device *hw_dev;
	212
	213	const char *board_name;
	214	const void *board_ptr;
	215	int attached;
ed9eccbe DS	216	spinlock_t spinlock;
	217	struct mutex mutex;
	218	int in_request_module;
	219
	220	int n_subdevices;
34c43922	221	struct comedi_subdevice *subdevices;
ed9eccbe DS	222
	223	/* dumb */
	224	unsigned long iobase;
	225	unsigned int irq;
	226
34c43922 BP	227	struct comedi_subdevice *read_subdev;
34c43922 BP	228	struct comedi_subdevice *write_subdev;
ed9eccbe DS	229
	230	struct fasync_struct *async_queue;
	231
3c17ba07	232	int (open) (struct comedi_device dev);
62eeae93	233	void (close) (struct comedi_device dev);
ed9eccbe DS	234	};
	235
	236	struct comedi_device_file_info {
71b5f4f1	237	struct comedi_device *device;
34c43922 BP	238	struct comedi_subdevice *read_subdevice;
34c43922 BP	239	struct comedi_subdevice *write_subdevice;
ed9eccbe DS	240	};
	241
	242	#ifdef CONFIG_COMEDI_DEBUG
	243	extern int comedi_debug;
	244	#else
e0dcef71	245	static const int comedi_debug;
ed9eccbe DS	246	#endif
	247
	248	/*
	249	* function prototypes
	250	*/
	251
34c43922	252	void comedi_event(struct comedi_device dev, struct comedi_subdevice s);
71b5f4f1	253	void comedi_error(const struct comedi_device dev, const char s);
ed9eccbe DS	254
	255	/* we can expand the number of bits used to encode devices/subdevices into
	256	the minor number soon, after more distros support > 8 bit minor numbers
	257	(like after Debian Etch gets released) */
	258	enum comedi_minor_bits {
	259	COMEDI_DEVICE_MINOR_MASK = 0xf,
	260	COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
	261	};
	262	static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
	263	static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
	264
e0dcef71	265	struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor);
ed9eccbe	266
62eeae93 SW	267	static inline struct comedi_subdevice *comedi_get_read_subdevice(
62eeae93 SW	268	const struct comedi_device_file_info *info)
ed9eccbe	269	{
e0dcef71 GKH	270	if (info->read_subdevice)
	271	return info->read_subdevice;
	272	if (info->device == NULL)
	273	return NULL;
ed9eccbe DS	274	return info->device->read_subdev;
	275	}
	276
62eeae93 SW	277	static inline struct comedi_subdevice *comedi_get_write_subdevice(
62eeae93 SW	278	const struct comedi_device_file_info *info)
ed9eccbe	279	{
e0dcef71 GKH	280	if (info->write_subdevice)
	281	return info->write_subdevice;
	282	if (info->device == NULL)
	283	return NULL;
ed9eccbe DS	284	return info->device->write_subdev;
	285	}
	286
71b5f4f1	287	void comedi_device_detach(struct comedi_device *dev);
0a85b6f0 MT	288	int comedi_device_attach(struct comedi_device *dev,
0a85b6f0 MT	289	struct comedi_devconfig *it);
139dfbdf BP	290	int comedi_driver_register(struct comedi_driver *);
139dfbdf BP	291	int comedi_driver_unregister(struct comedi_driver *);
ed9eccbe DS	292
	293	void init_polling(void);
	294	void cleanup_polling(void);
71b5f4f1 BP	295	void start_polling(struct comedi_device *);
71b5f4f1 BP	296	void stop_polling(struct comedi_device *);
ed9eccbe	297
ed9eccbe DS	298	#ifdef CONFIG_PROC_FS
	299	void comedi_proc_init(void);
	300	void comedi_proc_cleanup(void);
	301	#else
	302	static inline void comedi_proc_init(void)
	303	{
	304	}
0a85b6f0	305
ed9eccbe DS	306	static inline void comedi_proc_cleanup(void)
	307	{
	308	}
	309	#endif
	310
	311	/* subdevice runflags */
	312	enum subdevice_runflags {
	313	SRF_USER = 0x00000001,
	314	SRF_RT = 0x00000002,
e0dcef71 GKH	315	/* indicates an COMEDI_CB_ERROR event has occurred since the last
e0dcef71 GKH	316	* command was started */
ed9eccbe DS	317	SRF_ERROR = 0x00000004,
	318	SRF_RUNNING = 0x08000000
	319	};
	320
5e220112 MR	321	int comedi_check_chanlist(struct comedi_subdevice *s,
	322	int n,
	323	unsigned int *chanlist);
34c43922	324	unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);
ed9eccbe DS	325
	326	/* range stuff */
	327
e0dcef71 GKH	328	#define RANGE(a, b) {(a)1e6, (b)1e6, 0}
	329	#define RANGE_ext(a, b) {(a)1e6, (b)1e6, RF_EXTERNAL}
	330	#define RANGE_mA(a, b) {(a)1e6, (b)1e6, UNIT_mA}
baf22b64	331	#define RANGE_unitless(a, b) {(a)1e6, (b)1e6, 0}
e0dcef71 GKH	332	#define BIP_RANGE(a) {-(a)1e6, (a)1e6, 0}
e0dcef71 GKH	333	#define UNI_RANGE(a) {0, (a)*1e6, 0}
ed9eccbe	334
9ced1de6 BP	335	extern const struct comedi_lrange range_bipolar10;
	336	extern const struct comedi_lrange range_bipolar5;
	337	extern const struct comedi_lrange range_bipolar2_5;
	338	extern const struct comedi_lrange range_unipolar10;
	339	extern const struct comedi_lrange range_unipolar5;
	340	extern const struct comedi_lrange range_unknown;
ed9eccbe DS	341
	342	#define range_digital range_unipolar5
	343
	344	#if __GNUC__ >= 3
	345	#define GCC_ZERO_LENGTH_ARRAY
	346	#else
	347	#define GCC_ZERO_LENGTH_ARRAY 0
	348	#endif
	349
9ced1de6	350	struct comedi_lrange {
ed9eccbe	351	int length;
1f6325d6	352	struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
ed9eccbe DS	353	};
	354
	355	/* some silly little inline functions */
	356
71b5f4f1	357	static inline int alloc_subdevices(struct comedi_device *dev,
e0dcef71	358	unsigned int num_subdevices)
ed9eccbe DS	359	{
	360	unsigned i;
	361
	362	dev->n_subdevices = num_subdevices;
	363	dev->subdevices =
0a85b6f0 MT	364	kcalloc(num_subdevices, sizeof(struct comedi_subdevice),
0a85b6f0 MT	365	GFP_KERNEL);
ed9eccbe DS	366	if (!dev->subdevices)
	367	return -ENOMEM;
	368	for (i = 0; i < num_subdevices; ++i) {
	369	dev->subdevices[i].device = dev;
	370	dev->subdevices[i].async_dma_dir = DMA_NONE;
	371	spin_lock_init(&dev->subdevices[i].spin_lock);
	372	dev->subdevices[i].minor = -1;
	373	}
	374	return 0;
	375	}
	376
71b5f4f1	377	static inline int alloc_private(struct comedi_device *dev, int size)
ed9eccbe DS	378	{
	379	dev->private = kzalloc(size, GFP_KERNEL);
	380	if (!dev->private)
	381	return -ENOMEM;
	382	return 0;
	383	}
	384
34c43922	385	static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
ed9eccbe DS	386	{
ed9eccbe DS	387	if (subd->subdev_flags & SDF_LSAMPL)
790c5541	388	return sizeof(unsigned int);
ed9eccbe	389	else
790c5541	390	return sizeof(short);
ed9eccbe DS	391	}
	392
	393	/* must be used in attach to set dev->hw_dev if you wish to dma directly
	394	into comedi's buffer */
0a85b6f0 MT	395	static inline void comedi_set_hw_dev(struct comedi_device *dev,
0a85b6f0 MT	396	struct device *hw_dev)
ed9eccbe	397	{
e0dcef71	398	if (dev->hw_dev)
ed9eccbe	399	put_device(dev->hw_dev);
e0dcef71	400
ed9eccbe DS	401	dev->hw_dev = hw_dev;
	402	if (dev->hw_dev) {
	403	dev->hw_dev = get_device(dev->hw_dev);
	404	BUG_ON(dev->hw_dev == NULL);
	405	}
	406	}
	407
d163679c BP	408	int comedi_buf_put(struct comedi_async *async, short x);
d163679c BP	409	int comedi_buf_get(struct comedi_async async, short x);
ed9eccbe	410
d163679c	411	unsigned int comedi_buf_write_n_available(struct comedi_async *async);
0a85b6f0 MT	412	unsigned int comedi_buf_write_alloc(struct comedi_async *async,
0a85b6f0 MT	413	unsigned int nbytes);
d163679c	414	unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
0a85b6f0	415	unsigned int nbytes);
d163679c BP	416	unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
	417	unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
	418	unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
	419	unsigned int comedi_buf_read_n_available(struct comedi_async *async);
	420	void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
0a85b6f0	421	const void *source, unsigned int num_bytes);
d163679c	422	void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
0a85b6f0	423	void *destination, unsigned int num_bytes);
d163679c	424	static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
ed9eccbe DS	425	{
	426	return async->buf_write_alloc_count - async->buf_write_count;
	427	}
0a85b6f0	428
d163679c	429	static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
ed9eccbe DS	430	{
	431	return async->buf_read_alloc_count - async->buf_read_count;
	432	}
	433
ed9eccbe DS	434	static inline void *comedi_aux_data(int options[], int n)
	435	{
	436	unsigned long address;
	437	unsigned long addressLow;
	438	int bit_shift;
	439	if (sizeof(int) >= sizeof(void *))
	440	address = options[COMEDI_DEVCONF_AUX_DATA_LO];
	441	else {
	442	address = options[COMEDI_DEVCONF_AUX_DATA_HI];
	443	bit_shift = sizeof(int) * 8;
	444	address <<= bit_shift;
	445	addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
	446	addressLow &= (1UL << bit_shift) - 1;
	447	address \|= addressLow;
	448	}
	449	if (n >= 1)
	450	address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
	451	if (n >= 2)
	452	address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
	453	if (n >= 3)
	454	address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
	455	BUG_ON(n > 3);
	456	return (void *)address;
	457	}
	458
0a85b6f0 MT	459	int comedi_alloc_subdevice_minor(struct comedi_device *dev,
0a85b6f0 MT	460	struct comedi_subdevice *s);
34c43922	461	void comedi_free_subdevice_minor(struct comedi_subdevice *s);
ed9eccbe DS	462	int comedi_pci_auto_config(struct pci_dev pcidev, const char board_name);
ed9eccbe DS	463	void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
0a85b6f0	464	struct usb_device; /* forward declaration */
c28264da BP	465	int comedi_usb_auto_config(struct usb_device usbdev, const char board_name);
c28264da BP	466	void comedi_usb_auto_unconfig(struct usb_device *usbdev);
ed9eccbe	467
056d3ce5	468	#ifdef CONFIG_COMEDI_PCI_DRIVERS
0a85b6f0	469	#define CONFIG_COMEDI_PCI
056d3ce5 GKH	470	#endif
056d3ce5 GKH	471	#ifdef CONFIG_COMEDI_PCI_DRIVERS_MODULE
0a85b6f0	472	#define CONFIG_COMEDI_PCI
056d3ce5 GKH	473	#endif
056d3ce5 GKH	474	#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
0a85b6f0	475	#define CONFIG_COMEDI_PCMCIA
056d3ce5 GKH	476	#endif
056d3ce5 GKH	477	#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS_MODULE
0a85b6f0	478	#define CONFIG_COMEDI_PCMCIA
056d3ce5 GKH	479	#endif
056d3ce5 GKH	480
ed9eccbe	481	#endif /* _COMEDIDEV_H */