[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)				\
		pr_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_NUM_BOARD_MINORS 0x30

struct comedi_subdevice {
	struct comedi_device *device;
	int index;
	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;

	unsigned 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 *);
	void (*detach) (struct comedi_device *);
	int (*auto_attach) (struct comedi_device *, unsigned long);

	/* 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;
	bool attached:1;
	bool in_request_module:1;
	bool ioenabled:1;
	spinlock_t spinlock;
	struct mutex mutex;

	int n_subdevices;
	struct comedi_subdevice *subdevices;

	/* dumb */
	unsigned long iobase;
	unsigned long iolen;
	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);
};

static inline const void *comedi_board(const struct comedi_device *dev)
{
	return dev->board_ptr;
}

#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 *comedi_dev_from_minor(unsigned minor);

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

/* 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
};

bool comedi_is_subdevice_running(struct comedi_subdevice *s);

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

/* 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_unipolar2_5;
extern const struct comedi_lrange range_0_20mA;
extern const struct comedi_lrange range_4_20mA;
extern const struct comedi_lrange range_0_32mA;
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 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 set dev->hw_dev if you wish to dma directly into comedi's buffer.
 * Also useful for retrieving a previously configured hardware device of
 * known bus type.  Set automatically for auto-configured devices.
 * Automatically set to NULL when detaching hardware device.
 */
int comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev);

unsigned int comedi_buf_write_alloc(struct comedi_async *, unsigned int);
unsigned int comedi_buf_write_free(struct comedi_async *, unsigned int);

unsigned int comedi_buf_read_n_available(struct comedi_async *);
unsigned int comedi_buf_read_alloc(struct comedi_async *, unsigned int);
unsigned int comedi_buf_read_free(struct comedi_async *, unsigned int);

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

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);

/* drivers.c - general comedi driver functions */

int comedi_alloc_subdevices(struct comedi_device *, int);

void comedi_spriv_free(struct comedi_device *, int subdev_num);

int __comedi_request_region(struct comedi_device *,
			    unsigned long start, unsigned long len);
int comedi_request_region(struct comedi_device *,
			  unsigned long start, unsigned long len);
void comedi_legacy_detach(struct comedi_device *);

int comedi_auto_config(struct device *, struct comedi_driver *,
		       unsigned long context);
void comedi_auto_unconfig(struct device *);

int comedi_driver_register(struct comedi_driver *);
int comedi_driver_unregister(struct comedi_driver *);

/**
 * module_comedi_driver() - Helper macro for registering a comedi driver
 * @__comedi_driver: comedi_driver struct
 *
 * Helper macro for comedi drivers which do not do anything special in module
 * init/exit. This eliminates a lot of boilerplate. Each module may only use
 * this macro once, and calling it replaces module_init() and module_exit().
 */
#define module_comedi_driver(__comedi_driver) \
	module_driver(__comedi_driver, comedi_driver_register, \
			comedi_driver_unregister)

#ifdef CONFIG_COMEDI_PCI_DRIVERS

/* comedi_pci.c - comedi PCI driver specific functions */

/*
 * PCI Vendor IDs not in <linux/pci_ids.h>
 */
#define PCI_VENDOR_ID_KOLTER		0x1001
#define PCI_VENDOR_ID_ICP		0x104c
#define PCI_VENDOR_ID_AMCC		0x10e8
#define PCI_VENDOR_ID_DT		0x1116
#define PCI_VENDOR_ID_IOTECH		0x1616
#define PCI_VENDOR_ID_CONTEC		0x1221
#define PCI_VENDOR_ID_RTD		0x1435

struct pci_dev;
struct pci_driver;

struct pci_dev *comedi_to_pci_dev(struct comedi_device *);

int comedi_pci_enable(struct comedi_device *);
void comedi_pci_disable(struct comedi_device *);

int comedi_pci_auto_config(struct pci_dev *, struct comedi_driver *,
			   unsigned long context);
void comedi_pci_auto_unconfig(struct pci_dev *);

int comedi_pci_driver_register(struct comedi_driver *, struct pci_driver *);
void comedi_pci_driver_unregister(struct comedi_driver *, struct pci_driver *);

/**
 * module_comedi_pci_driver() - Helper macro for registering a comedi PCI driver
 * @__comedi_driver: comedi_driver struct
 * @__pci_driver: pci_driver struct
 *
 * Helper macro for comedi PCI drivers which do not do anything special
 * in module init/exit. This eliminates a lot of boilerplate. Each
 * module may only use this macro once, and calling it replaces
 * module_init() and module_exit()
 */
#define module_comedi_pci_driver(__comedi_driver, __pci_driver) \
	module_driver(__comedi_driver, comedi_pci_driver_register, \
			comedi_pci_driver_unregister, &(__pci_driver))

#else

/*
 * Some of the comedi mixed ISA/PCI drivers call the PCI specific
 * functions. Provide some dummy functions if CONFIG_COMEDI_PCI_DRIVERS
 * is not enabled.
 */

static inline struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
{
	return NULL;
}

static inline int comedi_pci_enable(struct comedi_device *dev)
{
	return -ENOSYS;
}

static inline void comedi_pci_disable(struct comedi_device *dev)
{
}

#endif /* CONFIG_COMEDI_PCI_DRIVERS */

#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS

/* comedi_pcmcia.c - comedi PCMCIA driver specific functions */

struct pcmcia_driver;
struct pcmcia_device;

struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *);

int comedi_pcmcia_enable(struct comedi_device *,
			 int (*conf_check)(struct pcmcia_device *, void *));
void comedi_pcmcia_disable(struct comedi_device *);

int comedi_pcmcia_auto_config(struct pcmcia_device *, struct comedi_driver *);
void comedi_pcmcia_auto_unconfig(struct pcmcia_device *);

int comedi_pcmcia_driver_register(struct comedi_driver *,
					struct pcmcia_driver *);
void comedi_pcmcia_driver_unregister(struct comedi_driver *,
					struct pcmcia_driver *);

/**
 * module_comedi_pcmcia_driver() - Helper macro for registering a comedi PCMCIA driver
 * @__comedi_driver: comedi_driver struct
 * @__pcmcia_driver: pcmcia_driver struct
 *
 * Helper macro for comedi PCMCIA drivers which do not do anything special
 * in module init/exit. This eliminates a lot of boilerplate. Each
 * module may only use this macro once, and calling it replaces
 * module_init() and module_exit()
 */
#define module_comedi_pcmcia_driver(__comedi_driver, __pcmcia_driver) \
	module_driver(__comedi_driver, comedi_pcmcia_driver_register, \
			comedi_pcmcia_driver_unregister, &(__pcmcia_driver))

#endif /* CONFIG_COMEDI_PCMCIA_DRIVERS */

#ifdef CONFIG_COMEDI_USB_DRIVERS

/* comedi_usb.c - comedi USB driver specific functions */

struct usb_driver;
struct usb_interface;

struct usb_interface *comedi_to_usb_interface(struct comedi_device *);

int comedi_usb_auto_config(struct usb_interface *, struct comedi_driver *,
			   unsigned long context);
void comedi_usb_auto_unconfig(struct usb_interface *);

int comedi_usb_driver_register(struct comedi_driver *, struct usb_driver *);
void comedi_usb_driver_unregister(struct comedi_driver *, struct usb_driver *);

/**
 * module_comedi_usb_driver() - Helper macro for registering a comedi USB driver
 * @__comedi_driver: comedi_driver struct
 * @__usb_driver: usb_driver struct
 *
 * Helper macro for comedi USB drivers which do not do anything special
 * in module init/exit. This eliminates a lot of boilerplate. Each
 * module may only use this macro once, and calling it replaces
 * module_init() and module_exit()
 */
#define module_comedi_usb_driver(__comedi_driver, __usb_driver) \
	module_driver(__comedi_driver, comedi_usb_driver_register, \
			comedi_usb_driver_unregister, &(__usb_driver))

#endif /* CONFIG_COMEDI_USB_DRIVERS */

#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 { \
e0dcef71 GKH	47	if (comedi_debug) \
4f870fe6	48	pr_debug("comedi: " format, ## args); \
e0dcef71	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	56	#define COMEDI_NUM_BOARD_MINORS 0x30
ed9eccbe	57
34c43922	58	struct comedi_subdevice {
71b5f4f1	59	struct comedi_device *device;
90a35c15	60	int index;
ed9eccbe DS	61	int type;
ed9eccbe DS	62	int n_chan;
baf22b64	63	int subdev_flags;
ed9eccbe DS	64	int len_chanlist; /* maximum length of channel/gain list */
	65
	66	void *private;
	67
d163679c	68	struct comedi_async *async;
ed9eccbe DS	69
	70	void *lock;
	71	void *busy;
	72	unsigned runflags;
	73	spinlock_t spin_lock;
	74
d4a7dc85	75	unsigned int io_bits;
ed9eccbe	76
790c5541 BP	77	unsigned int maxdata; /* if maxdata==0, use list */
790c5541 BP	78	const unsigned int maxdata_list; / list is channel specific */
ed9eccbe DS	79
	80	unsigned int flags;
	81	const unsigned int *flaglist;
	82
	83	unsigned int settling_time_0;
	84
9ced1de6 BP	85	const struct comedi_lrange *range_table;
9ced1de6 BP	86	const struct comedi_lrange const range_table_list;
ed9eccbe DS	87
	88	unsigned int chanlist; / driver-owned chanlist (not used) */
	89
0a85b6f0 MT	90	int (insn_read) (struct comedi_device , struct comedi_subdevice *,
	91	struct comedi_insn , unsigned int );
	92	int (insn_write) (struct comedi_device , struct comedi_subdevice *,
	93	struct comedi_insn , unsigned int );
	94	int (insn_bits) (struct comedi_device , struct comedi_subdevice *,
	95	struct comedi_insn , unsigned int );
	96	int (insn_config) (struct comedi_device , struct comedi_subdevice *,
	97	struct comedi_insn , unsigned int );
ed9eccbe	98
34c43922	99	int (do_cmd) (struct comedi_device , struct comedi_subdevice *);
0a85b6f0 MT	100	int (do_cmdtest) (struct comedi_device , struct comedi_subdevice *,
0a85b6f0 MT	101	struct comedi_cmd *);
34c43922 BP	102	int (poll) (struct comedi_device , struct comedi_subdevice *);
34c43922 BP	103	int (cancel) (struct comedi_device , struct comedi_subdevice *);
62eeae93 SW	104	/* int (do_lock)(struct comedi_device , struct comedi_subdevice ); /
	105	/* int (do_unlock)(struct comedi_device , \
	106	struct comedi_subdevice ); /
ed9eccbe DS	107
ed9eccbe DS	108	/* called when the buffer changes */
62eeae93 SW	109	int (buf_change) (struct comedi_device dev,
62eeae93 SW	110	struct comedi_subdevice *s, unsigned long new_size);
ed9eccbe	111
62eeae93	112	void (munge) (struct comedi_device dev, struct comedi_subdevice *s,
0a85b6f0 MT	113	void *data, unsigned int num_bytes,
0a85b6f0 MT	114	unsigned int start_chan_index);
ed9eccbe DS	115	enum dma_data_direction async_dma_dir;
	116
	117	unsigned int state;
	118
0bfbbe8f	119	struct device *class_dev;
ed9eccbe DS	120	int minor;
	121	};
	122
	123	struct comedi_buf_page {
	124	void *virt_addr;
	125	dma_addr_t dma_addr;
	126	};
	127
d163679c	128	struct comedi_async {
34c43922	129	struct comedi_subdevice *subdevice;
ed9eccbe DS	130
	131	void prealloc_buf; / pre-allocated buffer */
	132	unsigned int prealloc_bufsz; /* buffer size, in bytes */
62eeae93 SW	133	/* virtual and dma address of each page */
62eeae93 SW	134	struct comedi_buf_page *buf_page_list;
ed9eccbe DS	135	unsigned n_buf_pages; /* num elements in buf_page_list */
	136
	137	unsigned int max_bufsize; /* maximum buffer size, bytes */
62eeae93 SW	138	/* current number of mmaps of prealloc_buf */
	139	unsigned int mmap_count;
	140
	141	/* byte count for writer (write completed) */
	142	unsigned int buf_write_count;
	143	/* byte count for writer (allocated for writing) */
	144	unsigned int buf_write_alloc_count;
	145	/* byte count for reader (read completed) */
	146	unsigned int buf_read_count;
	147	/* byte count for reader (allocated for reading) */
	148	unsigned int buf_read_alloc_count;
ed9eccbe DS	149
	150	unsigned int buf_write_ptr; /* buffer marker for writer */
	151	unsigned int buf_read_ptr; /* buffer marker for reader */
	152
	153	unsigned int cur_chan; /* useless channel marker for interrupt */
	154	/* number of bytes that have been received for current scan */
	155	unsigned int scan_progress;
	156	/* keeps track of where we are in chanlist as for munging */
	157	unsigned int munge_chan;
	158	/* number of bytes that have been munged */
	159	unsigned int munge_count;
	160	/* buffer marker for munging */
	161	unsigned int munge_ptr;
	162
	163	unsigned int events; /* events that have occurred */
	164
ea6d0d4c	165	struct comedi_cmd cmd;
ed9eccbe DS	166
	167	wait_queue_head_t wait_head;
	168
e0dcef71	169	/* callback stuff */
ed9eccbe DS	170	unsigned int cb_mask;
	171	int (cb_func) (unsigned int flags, void );
	172	void *cb_arg;
	173
62eeae93	174	int (inttrig) (struct comedi_device dev, struct comedi_subdevice *s,
e0dcef71	175	unsigned int x);
ed9eccbe DS	176	};
ed9eccbe DS	177
139dfbdf BP	178	struct comedi_driver {
139dfbdf BP	179	struct comedi_driver *next;
ed9eccbe DS	180
	181	const char *driver_name;
	182	struct module *module;
0707bb04	183	int (attach) (struct comedi_device , struct comedi_devconfig *);
484ecc95	184	void (detach) (struct comedi_device );
8ed705af	185	int (auto_attach) (struct comedi_device , unsigned long);
ed9eccbe DS	186
	187	/* number of elements in board_name and board_id arrays */
	188	unsigned int num_names;
	189	const char const board_name;
	190	/* offset in bytes from one board name pointer to the next */
	191	int offset;
	192	};
	193
71b5f4f1	194	struct comedi_device {
ed9eccbe	195	int use_count;
139dfbdf	196	struct comedi_driver *driver;
ed9eccbe DS	197	void *private;
ed9eccbe DS	198
0bfbbe8f	199	struct device *class_dev;
ed9eccbe	200	int minor;
e0dcef71 GKH	201	/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
	202	* for subdevices that have async_dma_dir set to something other than
	203	* DMA_NONE */
ed9eccbe DS	204	struct device *hw_dev;
	205
	206	const char *board_name;
	207	const void *board_ptr;
a7401cdd	208	bool attached:1;
13f12b5a	209	bool in_request_module:1;
00ca6884	210	bool ioenabled:1;
ed9eccbe DS	211	spinlock_t spinlock;
ed9eccbe DS	212	struct mutex mutex;
ed9eccbe DS	213
ed9eccbe DS	214	int n_subdevices;
34c43922	215	struct comedi_subdevice *subdevices;
ed9eccbe DS	216
	217	/* dumb */
	218	unsigned long iobase;
316f97f1	219	unsigned long iolen;
ed9eccbe DS	220	unsigned int irq;
ed9eccbe DS	221
34c43922 BP	222	struct comedi_subdevice *read_subdev;
34c43922 BP	223	struct comedi_subdevice *write_subdev;
ed9eccbe DS	224
	225	struct fasync_struct *async_queue;
	226
3c17ba07	227	int (open) (struct comedi_device dev);
62eeae93	228	void (close) (struct comedi_device dev);
ed9eccbe DS	229	};
ed9eccbe DS	230
4dba6c02	231	static inline const void comedi_board(const struct comedi_device dev)
37859f88 HS	232	{
	233	return dev->board_ptr;
	234	}
	235
ed9eccbe DS	236	#ifdef CONFIG_COMEDI_DEBUG
	237	extern int comedi_debug;
	238	#else
e0dcef71	239	static const int comedi_debug;
ed9eccbe DS	240	#endif
	241
	242	/*
	243	* function prototypes
	244	*/
	245
34c43922	246	void comedi_event(struct comedi_device dev, struct comedi_subdevice s);
71b5f4f1	247	void comedi_error(const struct comedi_device dev, const char s);
ed9eccbe DS	248
	249	/* we can expand the number of bits used to encode devices/subdevices into
	250	the minor number soon, after more distros support > 8 bit minor numbers
	251	(like after Debian Etch gets released) */
	252	enum comedi_minor_bits {
	253	COMEDI_DEVICE_MINOR_MASK = 0xf,
	254	COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
	255	};
	256	static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
	257	static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
	258
85104e9b HS	259	struct comedi_device *comedi_dev_from_minor(unsigned minor);
85104e9b HS	260
ed9eccbe DS	261	void init_polling(void);
ed9eccbe DS	262	void cleanup_polling(void);
71b5f4f1 BP	263	void start_polling(struct comedi_device *);
71b5f4f1 BP	264	void stop_polling(struct comedi_device *);
ed9eccbe	265
ed9eccbe DS	266	/* subdevice runflags */
	267	enum subdevice_runflags {
	268	SRF_USER = 0x00000001,
	269	SRF_RT = 0x00000002,
e0dcef71 GKH	270	/* indicates an COMEDI_CB_ERROR event has occurred since the last
e0dcef71 GKH	271	* command was started */
ed9eccbe DS	272	SRF_ERROR = 0x00000004,
	273	SRF_RUNNING = 0x08000000
	274	};
	275
e0dac318 HS	276	bool comedi_is_subdevice_running(struct comedi_subdevice *s);
e0dac318 HS	277
5e220112 MR	278	int comedi_check_chanlist(struct comedi_subdevice *s,
	279	int n,
	280	unsigned int *chanlist);
ed9eccbe DS	281
	282	/* range stuff */
	283
e0dcef71 GKH	284	#define RANGE(a, b) {(a)1e6, (b)1e6, 0}
	285	#define RANGE_ext(a, b) {(a)1e6, (b)1e6, RF_EXTERNAL}
	286	#define RANGE_mA(a, b) {(a)1e6, (b)1e6, UNIT_mA}
baf22b64	287	#define RANGE_unitless(a, b) {(a)1e6, (b)1e6, 0}
e0dcef71 GKH	288	#define BIP_RANGE(a) {-(a)1e6, (a)1e6, 0}
e0dcef71 GKH	289	#define UNI_RANGE(a) {0, (a)*1e6, 0}
ed9eccbe	290
9ced1de6 BP	291	extern const struct comedi_lrange range_bipolar10;
	292	extern const struct comedi_lrange range_bipolar5;
	293	extern const struct comedi_lrange range_bipolar2_5;
	294	extern const struct comedi_lrange range_unipolar10;
	295	extern const struct comedi_lrange range_unipolar5;
5f8eb72c	296	extern const struct comedi_lrange range_unipolar2_5;
2c71c4ff HS	297	extern const struct comedi_lrange range_0_20mA;
	298	extern const struct comedi_lrange range_4_20mA;
	299	extern const struct comedi_lrange range_0_32mA;
9ced1de6	300	extern const struct comedi_lrange range_unknown;
ed9eccbe DS	301
	302	#define range_digital range_unipolar5
	303
	304	#if __GNUC__ >= 3
	305	#define GCC_ZERO_LENGTH_ARRAY
	306	#else
	307	#define GCC_ZERO_LENGTH_ARRAY 0
	308	#endif
	309
9ced1de6	310	struct comedi_lrange {
ed9eccbe	311	int length;
1f6325d6	312	struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
ed9eccbe DS	313	};
	314
	315	/* some silly little inline functions */
	316
34c43922	317	static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
ed9eccbe DS	318	{
ed9eccbe DS	319	if (subd->subdev_flags & SDF_LSAMPL)
790c5541	320	return sizeof(unsigned int);
ed9eccbe	321	else
790c5541	322	return sizeof(short);
ed9eccbe DS	323	}
ed9eccbe DS	324
bc3954b8 IA	325	/*
	326	* Must set dev->hw_dev if you wish to dma directly into comedi's buffer.
	327	* Also useful for retrieving a previously configured hardware device of
	328	* known bus type. Set automatically for auto-configured devices.
	329	* Automatically set to NULL when detaching hardware device.
	330	*/
da717511	331	int comedi_set_hw_dev(struct comedi_device dev, struct device hw_dev);
ed9eccbe	332
8ae560a1 HS	333	unsigned int comedi_buf_write_alloc(struct comedi_async *, unsigned int);
	334	unsigned int comedi_buf_write_free(struct comedi_async *, unsigned int);
	335
	336	unsigned int comedi_buf_read_n_available(struct comedi_async *);
	337	unsigned int comedi_buf_read_alloc(struct comedi_async *, unsigned int);
	338	unsigned int comedi_buf_read_free(struct comedi_async *, unsigned int);
	339
	340	int comedi_buf_put(struct comedi_async *, short);
	341	int comedi_buf_get(struct comedi_async , short );
	342
d163679c	343	void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
0a85b6f0	344	const void *source, unsigned int num_bytes);
d163679c	345	void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
0a85b6f0	346	void *destination, unsigned int num_bytes);
0a85b6f0	347
1ae6b20b HS	348	/* drivers.c - general comedi driver functions */
	349
	350	int comedi_alloc_subdevices(struct comedi_device *, int);
	351
2f69915c HS	352	void comedi_spriv_free(struct comedi_device *, int subdev_num);
2f69915c HS	353
ca8b2964 HS	354	int __comedi_request_region(struct comedi_device *,
ca8b2964 HS	355	unsigned long start, unsigned long len);
f375ac5f HS	356	int comedi_request_region(struct comedi_device *,
f375ac5f HS	357	unsigned long start, unsigned long len);
316f97f1	358	void comedi_legacy_detach(struct comedi_device *);
f375ac5f	359
1ae6b20b HS	360	int comedi_auto_config(struct device , struct comedi_driver ,
	361	unsigned long context);
	362	void comedi_auto_unconfig(struct device *);
	363
	364	int comedi_driver_register(struct comedi_driver *);
	365	int comedi_driver_unregister(struct comedi_driver *);
	366
	367	/**
	368	* module_comedi_driver() - Helper macro for registering a comedi driver
	369	* @__comedi_driver: comedi_driver struct
	370	*
	371	* Helper macro for comedi drivers which do not do anything special in module
	372	* init/exit. This eliminates a lot of boilerplate. Each module may only use
	373	* this macro once, and calling it replaces module_init() and module_exit().
	374	*/
	375	#define module_comedi_driver(__comedi_driver) \
	376	module_driver(__comedi_driver, comedi_driver_register, \
	377	comedi_driver_unregister)
581a7dde	378
33782dd5 HS	379	#ifdef CONFIG_COMEDI_PCI_DRIVERS
	380
	381	/* comedi_pci.c - comedi PCI driver specific functions */
	382
	383	/*
	384	* PCI Vendor IDs not in <linux/pci_ids.h>
	385	*/
	386	#define PCI_VENDOR_ID_KOLTER 0x1001
	387	#define PCI_VENDOR_ID_ICP 0x104c
	388	#define PCI_VENDOR_ID_AMCC 0x10e8
	389	#define PCI_VENDOR_ID_DT 0x1116
	390	#define PCI_VENDOR_ID_IOTECH 0x1616
	391	#define PCI_VENDOR_ID_CONTEC 0x1221
33782dd5	392	#define PCI_VENDOR_ID_RTD 0x1435
33782dd5 HS	393
	394	struct pci_dev;
	395	struct pci_driver;
	396
	397	struct pci_dev comedi_to_pci_dev(struct comedi_device );
	398
818f569f	399	int comedi_pci_enable(struct comedi_device *);
7f072f54	400	void comedi_pci_disable(struct comedi_device *);
33782dd5	401
b8f4ac23 HS	402	int comedi_pci_auto_config(struct pci_dev , struct comedi_driver ,
b8f4ac23 HS	403	unsigned long context);
33782dd5 HS	404	void comedi_pci_auto_unconfig(struct pci_dev *);
	405
	406	int comedi_pci_driver_register(struct comedi_driver , struct pci_driver );
	407	void comedi_pci_driver_unregister(struct comedi_driver , struct pci_driver );
	408
	409	/**
	410	* module_comedi_pci_driver() - Helper macro for registering a comedi PCI driver
	411	* @__comedi_driver: comedi_driver struct
	412	* @__pci_driver: pci_driver struct
	413	*
	414	* Helper macro for comedi PCI drivers which do not do anything special
	415	* in module init/exit. This eliminates a lot of boilerplate. Each
	416	* module may only use this macro once, and calling it replaces
	417	* module_init() and module_exit()
	418	*/
	419	#define module_comedi_pci_driver(__comedi_driver, __pci_driver) \
	420	module_driver(__comedi_driver, comedi_pci_driver_register, \
	421	comedi_pci_driver_unregister, &(__pci_driver))
	422
	423	#else
	424
	425	/*
	426	* Some of the comedi mixed ISA/PCI drivers call the PCI specific
	427	* functions. Provide some dummy functions if CONFIG_COMEDI_PCI_DRIVERS
	428	* is not enabled.
	429	*/
	430
	431	static inline struct pci_dev comedi_to_pci_dev(struct comedi_device dev)
	432	{
	433	return NULL;
	434	}
	435
818f569f	436	static inline int comedi_pci_enable(struct comedi_device *dev)
33782dd5 HS	437	{
	438	return -ENOSYS;
	439	}
	440
7f072f54	441	static inline void comedi_pci_disable(struct comedi_device *dev)
581a7dde	442	{
581a7dde IA	443	}
581a7dde IA	444
33782dd5	445	#endif /* CONFIG_COMEDI_PCI_DRIVERS */
581a7dde	446
309231d7 HS	447	#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
	448
	449	/* comedi_pcmcia.c - comedi PCMCIA driver specific functions */
	450
	451	struct pcmcia_driver;
1f021e1f HS	452	struct pcmcia_device;
	453
	454	struct pcmcia_device comedi_to_pcmcia_dev(struct comedi_device );
	455
a3ac9519 HS	456	int comedi_pcmcia_enable(struct comedi_device *,
a3ac9519 HS	457	int (conf_check)(struct pcmcia_device , void *));
ddb2d0a0 HS	458	void comedi_pcmcia_disable(struct comedi_device *);
ddb2d0a0 HS	459
1f021e1f HS	460	int comedi_pcmcia_auto_config(struct pcmcia_device , struct comedi_driver );
1f021e1f HS	461	void comedi_pcmcia_auto_unconfig(struct pcmcia_device *);
309231d7 HS	462
	463	int comedi_pcmcia_driver_register(struct comedi_driver *,
	464	struct pcmcia_driver *);
	465	void comedi_pcmcia_driver_unregister(struct comedi_driver *,
	466	struct pcmcia_driver *);
	467
	468	/**
	469	* module_comedi_pcmcia_driver() - Helper macro for registering a comedi PCMCIA driver
	470	* @__comedi_driver: comedi_driver struct
	471	* @__pcmcia_driver: pcmcia_driver struct
	472	*
	473	* Helper macro for comedi PCMCIA drivers which do not do anything special
	474	* in module init/exit. This eliminates a lot of boilerplate. Each
	475	* module may only use this macro once, and calling it replaces
	476	* module_init() and module_exit()
	477	*/
	478	#define module_comedi_pcmcia_driver(__comedi_driver, __pcmcia_driver) \
	479	module_driver(__comedi_driver, comedi_pcmcia_driver_register, \
	480	comedi_pcmcia_driver_unregister, &(__pcmcia_driver))
	481
	482	#endif /* CONFIG_COMEDI_PCMCIA_DRIVERS */
	483
abac8b54	484	#ifdef CONFIG_COMEDI_USB_DRIVERS
581a7dde	485
abac8b54 HS	486	/* comedi_usb.c - comedi USB driver specific functions */
	487
	488	struct usb_driver;
	489	struct usb_interface;
	490
	491	struct usb_interface comedi_to_usb_interface(struct comedi_device );
	492
55ab4f64 HS	493	int comedi_usb_auto_config(struct usb_interface , struct comedi_driver ,
55ab4f64 HS	494	unsigned long context);
abac8b54 HS	495	void comedi_usb_auto_unconfig(struct usb_interface *);
	496
	497	int comedi_usb_driver_register(struct comedi_driver , struct usb_driver );
	498	void comedi_usb_driver_unregister(struct comedi_driver , struct usb_driver );
	499
	500	/**
	501	* module_comedi_usb_driver() - Helper macro for registering a comedi USB driver
	502	* @__comedi_driver: comedi_driver struct
	503	* @__usb_driver: usb_driver struct
	504	*
	505	* Helper macro for comedi USB drivers which do not do anything special
	506	* in module init/exit. This eliminates a lot of boilerplate. Each
	507	* module may only use this macro once, and calling it replaces
	508	* module_init() and module_exit()
	509	*/
	510	#define module_comedi_usb_driver(__comedi_driver, __usb_driver) \
	511	module_driver(__comedi_driver, comedi_usb_driver_register, \
	512	comedi_usb_driver_unregister, &(__usb_driver))
	513
	514	#endif /* CONFIG_COMEDI_USB_DRIVERS */
ed9eccbe	515
ed9eccbe	516	#endif /* _COMEDIDEV_H */