/*
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.
*/
#ifndef _COMEDIDEV_H
#define _COMEDIDEV_H
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/spinlock_types.h>
#include <linux/rwsem.h>
#include <linux/kref.h>
#include "comedi.h"
#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 */
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_buf_map {
struct device *dma_hw_dev;
struct comedi_buf_page *page_list;
unsigned int n_pages;
enum dma_data_direction dma_dir;
struct kref refcount;
};
struct comedi_async {
struct comedi_subdevice *subdevice;
void *prealloc_buf; /* pre-allocated buffer */
unsigned int prealloc_bufsz; /* buffer size, in bytes */
struct comedi_buf_map *buf_map; /* map of buffer pages */
unsigned int max_bufsize; /* maximum buffer size, bytes */
/* 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;
unsigned int cb_mask;
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;
unsigned int detach_count;
/* 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;
struct rw_semaphore attach_lock;
struct kref refcount;
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;
}
/*
* 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_get_from_minor(unsigned minor);
int comedi_dev_put(struct comedi_device *dev);
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_RT = 0x00000002,
/* indicates an COMEDI_CB_ERROR event has occurred since the last
* command was started */
SRF_ERROR = 0x00000004,
SRF_RUNNING = 0x08000000,
SRF_FREE_SPRIV = 0x80000000, /* free s->private on detach */
};
bool comedi_is_subdevice_running(struct comedi_subdevice *s);
void *comedi_alloc_spriv(struct comedi_subdevice *s, size_t size);
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];
};
static inline bool comedi_range_is_bipolar(struct comedi_subdevice *s,
unsigned int range)
{
return s->range_table->range[range].min < 0;
}
static inline bool comedi_range_is_unipolar(struct comedi_subdevice *s,
unsigned int range)
{
return s->range_table->range[range].min >= 0;
}
static inline bool comedi_chan_range_is_bipolar(struct comedi_subdevice *s,
unsigned int chan,
unsigned int range)
{
return s->range_table_list[chan]->range[range].min < 0;
}
static inline bool comedi_chan_range_is_unipolar(struct comedi_subdevice *s,
unsigned int chan,
unsigned int range)
{
return s->range_table_list[chan]->range[range].min >= 0;
}
/* munge between offset binary and two's complement values */
static inline unsigned int comedi_offset_munge(struct comedi_subdevice *s,
unsigned int val)
{
return val ^ s->maxdata ^ (s->maxdata >> 1);
}
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 *, unsigned short);
int comedi_buf_get(struct comedi_async *, unsigned 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 */
#define COMEDI_TIMEOUT_MS 1000
int comedi_timeout(struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *,
int (*cb)(struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *, unsigned long context),
unsigned long context);
int comedi_dio_insn_config(struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *, unsigned int *data,
unsigned int mask);
unsigned int comedi_dio_update_state(struct comedi_subdevice *,
unsigned int *data);
void *comedi_alloc_devpriv(struct comedi_device *, size_t);
int comedi_alloc_subdevices(struct comedi_device *, int);
int comedi_load_firmware(struct comedi_device *, struct device *,
const char *name,
int (*cb)(struct comedi_device *,
const u8 *data, size_t size,
unsigned long context),
unsigned long context);
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 *);
void 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_DT 0x1116
#define PCI_VENDOR_ID_IOTECH 0x1616
#define PCI_VENDOR_ID_CONTEC 0x1221
#define PCI_VENDOR_ID_RTD 0x1435
#define PCI_VENDOR_ID_HUMUSOFT 0x186c
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 *);
struct usb_device *comedi_to_usb_dev(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 */
