[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 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_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;

	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,
			 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
	55
	56	#define COMEDI_INITCLEANUP_NOMODULE(x) \
	57	static int __init x ## _init_module(void) \
51b713a6	58	{return comedi_driver_register(&(x)); } \
ed9eccbe	59	static void __exit x ## _cleanup_module(void) \
baf22b64	60	{comedi_driver_unregister(&(x)); } \
ed9eccbe	61	module_init(x ## _init_module); \
62eeae93	62	module_exit(x ## _cleanup_module);
ed9eccbe DS	63
	64	#define COMEDI_MODULE_MACROS \
	65	MODULE_AUTHOR("Comedi http://www.comedi.org"); \
	66	MODULE_DESCRIPTION("Comedi low-level driver"); \
62eeae93	67	MODULE_LICENSE("GPL");
ed9eccbe DS	68
	69	#define COMEDI_INITCLEANUP(x) \
	70	COMEDI_MODULE_MACROS \
	71	COMEDI_INITCLEANUP_NOMODULE(x)
	72
	73	#define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \
	74	static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \
	75	const struct pci_device_id *ent) \
	76	{ \
	77	return comedi_pci_auto_config(dev, comedi_driver.driver_name); \
	78	} \
62eeae93 SW	79	static void __devexit comedi_driver ## _pci_remove(\
62eeae93 SW	80	struct pci_dev *dev) \
ed9eccbe DS	81	{ \
	82	comedi_pci_auto_unconfig(dev); \
	83	} \
	84	static struct pci_driver comedi_driver ## _pci_driver = \
	85	{ \
	86	.id_table = pci_id_table, \
e0dcef71 GKH	87	.probe = &comedi_driver ## _pci_probe, \
e0dcef71 GKH	88	.remove = __devexit_p(&comedi_driver ## _pci_remove) \
ed9eccbe DS	89	}; \
	90	static int __init comedi_driver ## _init_module(void) \
	91	{ \
	92	int retval; \
e0dcef71 GKH	93	retval = comedi_driver_register(&comedi_driver); \
	94	if (retval < 0) \
	95	return retval; \
62eeae93 SW	96	comedi_driver ## _pci_driver.name = \
62eeae93 SW	97	(char *)comedi_driver.driver_name; \
e0dcef71	98	return pci_register_driver(&comedi_driver ## _pci_driver); \
ed9eccbe DS	99	} \
	100	static void __exit comedi_driver ## _cleanup_module(void) \
	101	{ \
e0dcef71 GKH	102	pci_unregister_driver(&comedi_driver ## _pci_driver); \
e0dcef71 GKH	103	comedi_driver_unregister(&comedi_driver); \
ed9eccbe DS	104	} \
	105	module_init(comedi_driver ## _init_module); \
	106	module_exit(comedi_driver ## _cleanup_module);
	107
	108	#define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \
	109	COMEDI_MODULE_MACROS \
	110	COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table)
	111
ed9eccbe DS	112	#define PCI_VENDOR_ID_ADLINK 0x144a
	113	#define PCI_VENDOR_ID_ICP 0x104c
	114	#define PCI_VENDOR_ID_CONTEC 0x1221
ed9eccbe DS	115
ed9eccbe DS	116	#define COMEDI_NUM_MINORS 0x100
ed9eccbe DS	117	#define COMEDI_NUM_BOARD_MINORS 0x30
	118	#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS
	119
ed9eccbe DS	120	#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
	121	device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)
	122
34c43922	123	struct comedi_subdevice {
71b5f4f1	124	struct comedi_device *device;
ed9eccbe DS	125	int type;
ed9eccbe DS	126	int n_chan;
baf22b64	127	int subdev_flags;
ed9eccbe DS	128	int len_chanlist; /* maximum length of channel/gain list */
	129
	130	void *private;
	131
d163679c	132	struct comedi_async *async;
ed9eccbe DS	133
	134	void *lock;
	135	void *busy;
	136	unsigned runflags;
	137	spinlock_t spin_lock;
	138
	139	int io_bits;
	140
790c5541 BP	141	unsigned int maxdata; /* if maxdata==0, use list */
790c5541 BP	142	const unsigned int maxdata_list; / list is channel specific */
ed9eccbe DS	143
	144	unsigned int flags;
	145	const unsigned int *flaglist;
	146
	147	unsigned int settling_time_0;
	148
9ced1de6 BP	149	const struct comedi_lrange *range_table;
9ced1de6 BP	150	const struct comedi_lrange const range_table_list;
ed9eccbe DS	151
	152	unsigned int chanlist; / driver-owned chanlist (not used) */
	153
0a85b6f0 MT	154	int (insn_read) (struct comedi_device , struct comedi_subdevice *,
	155	struct comedi_insn , unsigned int );
	156	int (insn_write) (struct comedi_device , struct comedi_subdevice *,
	157	struct comedi_insn , unsigned int );
	158	int (insn_bits) (struct comedi_device , struct comedi_subdevice *,
	159	struct comedi_insn , unsigned int );
	160	int (insn_config) (struct comedi_device , struct comedi_subdevice *,
	161	struct comedi_insn , unsigned int );
ed9eccbe	162
34c43922	163	int (do_cmd) (struct comedi_device , struct comedi_subdevice *);
0a85b6f0 MT	164	int (do_cmdtest) (struct comedi_device , struct comedi_subdevice *,
0a85b6f0 MT	165	struct comedi_cmd *);
34c43922 BP	166	int (poll) (struct comedi_device , struct comedi_subdevice *);
34c43922 BP	167	int (cancel) (struct comedi_device , struct comedi_subdevice *);
62eeae93 SW	168	/* int (do_lock)(struct comedi_device , struct comedi_subdevice ); /
	169	/* int (do_unlock)(struct comedi_device , \
	170	struct comedi_subdevice ); /
ed9eccbe DS	171
ed9eccbe DS	172	/* called when the buffer changes */
62eeae93 SW	173	int (buf_change) (struct comedi_device dev,
62eeae93 SW	174	struct comedi_subdevice *s, unsigned long new_size);
ed9eccbe	175
62eeae93	176	void (munge) (struct comedi_device dev, struct comedi_subdevice *s,
0a85b6f0 MT	177	void *data, unsigned int num_bytes,
0a85b6f0 MT	178	unsigned int start_chan_index);
ed9eccbe DS	179	enum dma_data_direction async_dma_dir;
	180
	181	unsigned int state;
	182
0bfbbe8f	183	struct device *class_dev;
ed9eccbe DS	184	int minor;
	185	};
	186
	187	struct comedi_buf_page {
	188	void *virt_addr;
	189	dma_addr_t dma_addr;
	190	};
	191
d163679c	192	struct comedi_async {
34c43922	193	struct comedi_subdevice *subdevice;
ed9eccbe DS	194
	195	void prealloc_buf; / pre-allocated buffer */
	196	unsigned int prealloc_bufsz; /* buffer size, in bytes */
62eeae93 SW	197	/* virtual and dma address of each page */
62eeae93 SW	198	struct comedi_buf_page *buf_page_list;
ed9eccbe DS	199	unsigned n_buf_pages; /* num elements in buf_page_list */
	200
	201	unsigned int max_bufsize; /* maximum buffer size, bytes */
62eeae93 SW	202	/* current number of mmaps of prealloc_buf */
	203	unsigned int mmap_count;
	204
	205	/* byte count for writer (write completed) */
	206	unsigned int buf_write_count;
	207	/* byte count for writer (allocated for writing) */
	208	unsigned int buf_write_alloc_count;
	209	/* byte count for reader (read completed) */
	210	unsigned int buf_read_count;
	211	/* byte count for reader (allocated for reading) */
	212	unsigned int buf_read_alloc_count;
ed9eccbe DS	213
	214	unsigned int buf_write_ptr; /* buffer marker for writer */
	215	unsigned int buf_read_ptr; /* buffer marker for reader */
	216
	217	unsigned int cur_chan; /* useless channel marker for interrupt */
	218	/* number of bytes that have been received for current scan */
	219	unsigned int scan_progress;
	220	/* keeps track of where we are in chanlist as for munging */
	221	unsigned int munge_chan;
	222	/* number of bytes that have been munged */
	223	unsigned int munge_count;
	224	/* buffer marker for munging */
	225	unsigned int munge_ptr;
	226
	227	unsigned int events; /* events that have occurred */
	228
ea6d0d4c	229	struct comedi_cmd cmd;
ed9eccbe DS	230
	231	wait_queue_head_t wait_head;
	232
e0dcef71	233	/* callback stuff */
ed9eccbe DS	234	unsigned int cb_mask;
	235	int (cb_func) (unsigned int flags, void );
	236	void *cb_arg;
	237
62eeae93	238	int (inttrig) (struct comedi_device dev, struct comedi_subdevice *s,
e0dcef71	239	unsigned int x);
ed9eccbe DS	240	};
ed9eccbe DS	241
139dfbdf BP	242	struct comedi_driver {
139dfbdf BP	243	struct comedi_driver *next;
ed9eccbe DS	244
	245	const char *driver_name;
	246	struct module *module;
0707bb04	247	int (attach) (struct comedi_device , struct comedi_devconfig *);
71b5f4f1	248	int (detach) (struct comedi_device );
ed9eccbe DS	249
	250	/* number of elements in board_name and board_id arrays */
	251	unsigned int num_names;
	252	const char const board_name;
	253	/* offset in bytes from one board name pointer to the next */
	254	int offset;
	255	};
	256
71b5f4f1	257	struct comedi_device {
ed9eccbe	258	int use_count;
139dfbdf	259	struct comedi_driver *driver;
ed9eccbe DS	260	void *private;
ed9eccbe DS	261
0bfbbe8f	262	struct device *class_dev;
ed9eccbe	263	int minor;
e0dcef71 GKH	264	/* hw_dev is passed to dma_alloc_coherent when allocating async buffers
	265	* for subdevices that have async_dma_dir set to something other than
	266	* DMA_NONE */
ed9eccbe DS	267	struct device *hw_dev;
	268
	269	const char *board_name;
	270	const void *board_ptr;
	271	int attached;
ed9eccbe DS	272	spinlock_t spinlock;
	273	struct mutex mutex;
	274	int in_request_module;
	275
	276	int n_subdevices;
34c43922	277	struct comedi_subdevice *subdevices;
ed9eccbe DS	278
	279	/* dumb */
	280	unsigned long iobase;
	281	unsigned int irq;
	282
34c43922 BP	283	struct comedi_subdevice *read_subdev;
34c43922 BP	284	struct comedi_subdevice *write_subdev;
ed9eccbe DS	285
	286	struct fasync_struct *async_queue;
	287
62eeae93 SW	288	void (open) (struct comedi_device dev);
62eeae93 SW	289	void (close) (struct comedi_device dev);
ed9eccbe DS	290	};
	291
	292	struct comedi_device_file_info {
71b5f4f1	293	struct comedi_device *device;
34c43922 BP	294	struct comedi_subdevice *read_subdevice;
34c43922 BP	295	struct comedi_subdevice *write_subdevice;
ed9eccbe DS	296	};
	297
	298	#ifdef CONFIG_COMEDI_DEBUG
	299	extern int comedi_debug;
	300	#else
e0dcef71	301	static const int comedi_debug;
ed9eccbe DS	302	#endif
	303
	304	/*
	305	* function prototypes
	306	*/
	307
34c43922	308	void comedi_event(struct comedi_device dev, struct comedi_subdevice s);
71b5f4f1	309	void comedi_error(const struct comedi_device dev, const char s);
ed9eccbe DS	310
	311	/* we can expand the number of bits used to encode devices/subdevices into
	312	the minor number soon, after more distros support > 8 bit minor numbers
	313	(like after Debian Etch gets released) */
	314	enum comedi_minor_bits {
	315	COMEDI_DEVICE_MINOR_MASK = 0xf,
	316	COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
	317	};
	318	static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
	319	static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
	320
e0dcef71	321	struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor);
ed9eccbe	322
62eeae93 SW	323	static inline struct comedi_subdevice *comedi_get_read_subdevice(
62eeae93 SW	324	const struct comedi_device_file_info *info)
ed9eccbe	325	{
e0dcef71 GKH	326	if (info->read_subdevice)
	327	return info->read_subdevice;
	328	if (info->device == NULL)
	329	return NULL;
ed9eccbe DS	330	return info->device->read_subdev;
	331	}
	332
62eeae93 SW	333	static inline struct comedi_subdevice *comedi_get_write_subdevice(
62eeae93 SW	334	const struct comedi_device_file_info *info)
ed9eccbe	335	{
e0dcef71 GKH	336	if (info->write_subdevice)
	337	return info->write_subdevice;
	338	if (info->device == NULL)
	339	return NULL;
ed9eccbe DS	340	return info->device->write_subdev;
	341	}
	342
71b5f4f1	343	void comedi_device_detach(struct comedi_device *dev);
0a85b6f0 MT	344	int comedi_device_attach(struct comedi_device *dev,
0a85b6f0 MT	345	struct comedi_devconfig *it);
139dfbdf BP	346	int comedi_driver_register(struct comedi_driver *);
139dfbdf BP	347	int comedi_driver_unregister(struct comedi_driver *);
ed9eccbe DS	348
	349	void init_polling(void);
	350	void cleanup_polling(void);
71b5f4f1 BP	351	void start_polling(struct comedi_device *);
71b5f4f1 BP	352	void stop_polling(struct comedi_device *);
ed9eccbe	353
ed9eccbe DS	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	}
0a85b6f0	361
ed9eccbe DS	362	static inline void comedi_proc_cleanup(void)
	363	{
	364	}
	365	#endif
	366
	367	/* subdevice runflags */
	368	enum subdevice_runflags {
	369	SRF_USER = 0x00000001,
	370	SRF_RT = 0x00000002,
e0dcef71 GKH	371	/* indicates an COMEDI_CB_ERROR event has occurred since the last
e0dcef71 GKH	372	* command was started */
ed9eccbe DS	373	SRF_ERROR = 0x00000004,
	374	SRF_RUNNING = 0x08000000
	375	};
	376
5e220112 MR	377	int comedi_check_chanlist(struct comedi_subdevice *s,
	378	int n,
	379	unsigned int *chanlist);
34c43922	380	unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s);
ed9eccbe DS	381
	382	/* range stuff */
	383
e0dcef71 GKH	384	#define RANGE(a, b) {(a)1e6, (b)1e6, 0}
	385	#define RANGE_ext(a, b) {(a)1e6, (b)1e6, RF_EXTERNAL}
	386	#define RANGE_mA(a, b) {(a)1e6, (b)1e6, UNIT_mA}
baf22b64	387	#define RANGE_unitless(a, b) {(a)1e6, (b)1e6, 0}
e0dcef71 GKH	388	#define BIP_RANGE(a) {-(a)1e6, (a)1e6, 0}
e0dcef71 GKH	389	#define UNI_RANGE(a) {0, (a)*1e6, 0}
ed9eccbe	390
9ced1de6 BP	391	extern const struct comedi_lrange range_bipolar10;
	392	extern const struct comedi_lrange range_bipolar5;
	393	extern const struct comedi_lrange range_bipolar2_5;
	394	extern const struct comedi_lrange range_unipolar10;
	395	extern const struct comedi_lrange range_unipolar5;
	396	extern const struct comedi_lrange range_unknown;
ed9eccbe DS	397
	398	#define range_digital range_unipolar5
	399
	400	#if __GNUC__ >= 3
	401	#define GCC_ZERO_LENGTH_ARRAY
	402	#else
	403	#define GCC_ZERO_LENGTH_ARRAY 0
	404	#endif
	405
9ced1de6	406	struct comedi_lrange {
ed9eccbe	407	int length;
1f6325d6	408	struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
ed9eccbe DS	409	};
	410
	411	/* some silly little inline functions */
	412
71b5f4f1	413	static inline int alloc_subdevices(struct comedi_device *dev,
e0dcef71	414	unsigned int num_subdevices)
ed9eccbe DS	415	{
	416	unsigned i;
	417
	418	dev->n_subdevices = num_subdevices;
	419	dev->subdevices =
0a85b6f0 MT	420	kcalloc(num_subdevices, sizeof(struct comedi_subdevice),
0a85b6f0 MT	421	GFP_KERNEL);
ed9eccbe DS	422	if (!dev->subdevices)
	423	return -ENOMEM;
	424	for (i = 0; i < num_subdevices; ++i) {
	425	dev->subdevices[i].device = dev;
	426	dev->subdevices[i].async_dma_dir = DMA_NONE;
	427	spin_lock_init(&dev->subdevices[i].spin_lock);
	428	dev->subdevices[i].minor = -1;
	429	}
	430	return 0;
	431	}
	432
71b5f4f1	433	static inline int alloc_private(struct comedi_device *dev, int size)
ed9eccbe DS	434	{
	435	dev->private = kzalloc(size, GFP_KERNEL);
	436	if (!dev->private)
	437	return -ENOMEM;
	438	return 0;
	439	}
	440
34c43922	441	static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
ed9eccbe DS	442	{
ed9eccbe DS	443	if (subd->subdev_flags & SDF_LSAMPL)
790c5541	444	return sizeof(unsigned int);
ed9eccbe	445	else
790c5541	446	return sizeof(short);
ed9eccbe DS	447	}
	448
	449	/* must be used in attach to set dev->hw_dev if you wish to dma directly
	450	into comedi's buffer */
0a85b6f0 MT	451	static inline void comedi_set_hw_dev(struct comedi_device *dev,
0a85b6f0 MT	452	struct device *hw_dev)
ed9eccbe	453	{
e0dcef71	454	if (dev->hw_dev)
ed9eccbe	455	put_device(dev->hw_dev);
e0dcef71	456
ed9eccbe DS	457	dev->hw_dev = hw_dev;
	458	if (dev->hw_dev) {
	459	dev->hw_dev = get_device(dev->hw_dev);
	460	BUG_ON(dev->hw_dev == NULL);
	461	}
	462	}
	463
d163679c BP	464	int comedi_buf_put(struct comedi_async *async, short x);
d163679c BP	465	int comedi_buf_get(struct comedi_async async, short x);
ed9eccbe	466
d163679c	467	unsigned int comedi_buf_write_n_available(struct comedi_async *async);
0a85b6f0 MT	468	unsigned int comedi_buf_write_alloc(struct comedi_async *async,
0a85b6f0 MT	469	unsigned int nbytes);
d163679c	470	unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
0a85b6f0	471	unsigned int nbytes);
d163679c BP	472	unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes);
	473	unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes);
	474	unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes);
	475	unsigned int comedi_buf_read_n_available(struct comedi_async *async);
	476	void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
0a85b6f0	477	const void *source, unsigned int num_bytes);
d163679c	478	void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
0a85b6f0	479	void *destination, unsigned int num_bytes);
d163679c	480	static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async)
ed9eccbe DS	481	{
	482	return async->buf_write_alloc_count - async->buf_write_count;
	483	}
0a85b6f0	484
d163679c	485	static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async)
ed9eccbe DS	486	{
	487	return async->buf_read_alloc_count - async->buf_read_count;
	488	}
	489
ed9eccbe DS	490	static inline void *comedi_aux_data(int options[], int n)
	491	{
	492	unsigned long address;
	493	unsigned long addressLow;
	494	int bit_shift;
	495	if (sizeof(int) >= sizeof(void *))
	496	address = options[COMEDI_DEVCONF_AUX_DATA_LO];
	497	else {
	498	address = options[COMEDI_DEVCONF_AUX_DATA_HI];
	499	bit_shift = sizeof(int) * 8;
	500	address <<= bit_shift;
	501	addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
	502	addressLow &= (1UL << bit_shift) - 1;
	503	address \|= addressLow;
	504	}
	505	if (n >= 1)
	506	address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
	507	if (n >= 2)
	508	address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
	509	if (n >= 3)
	510	address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
	511	BUG_ON(n > 3);
	512	return (void *)address;
	513	}
	514
0a85b6f0 MT	515	int comedi_alloc_subdevice_minor(struct comedi_device *dev,
0a85b6f0 MT	516	struct comedi_subdevice *s);
34c43922	517	void comedi_free_subdevice_minor(struct comedi_subdevice *s);
ed9eccbe DS	518	int comedi_pci_auto_config(struct pci_dev pcidev, const char board_name);
ed9eccbe DS	519	void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
0a85b6f0	520	struct usb_device; /* forward declaration */
c28264da BP	521	int comedi_usb_auto_config(struct usb_device usbdev, const char board_name);
c28264da BP	522	void comedi_usb_auto_unconfig(struct usb_device *usbdev);
ed9eccbe	523
056d3ce5	524	#ifdef CONFIG_COMEDI_PCI_DRIVERS
0a85b6f0	525	#define CONFIG_COMEDI_PCI
056d3ce5 GKH	526	#endif
056d3ce5 GKH	527	#ifdef CONFIG_COMEDI_PCI_DRIVERS_MODULE
0a85b6f0	528	#define CONFIG_COMEDI_PCI
056d3ce5 GKH	529	#endif
056d3ce5 GKH	530	#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
0a85b6f0	531	#define CONFIG_COMEDI_PCMCIA
056d3ce5 GKH	532	#endif
056d3ce5 GKH	533	#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS_MODULE
0a85b6f0	534	#define CONFIG_COMEDI_PCMCIA
056d3ce5 GKH	535	#endif
056d3ce5 GKH	536
ed9eccbe	537	#endif /* _COMEDIDEV_H */