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| Current File : //usr/include/linux/parport.h |
/*
* Any part of this program may be used in documents licensed under
* the GNU Free Documentation License, Version 1.1 or any later version
* published by the Free Software Foundation.
*/
#ifndef _PARPORT_H_
#define _PARPORT_H_
/* Start off with user-visible constants */
/* Maximum of 16 ports per machine */
#define PARPORT_MAX 16
/* Magic numbers */
#define PARPORT_IRQ_NONE -1
#define PARPORT_DMA_NONE -1
#define PARPORT_IRQ_AUTO -2
#define PARPORT_DMA_AUTO -2
#define PARPORT_DMA_NOFIFO -3
#define PARPORT_DISABLE -2
#define PARPORT_IRQ_PROBEONLY -3
#define PARPORT_IOHI_AUTO -1
#define PARPORT_CONTROL_STROBE 0x1
#define PARPORT_CONTROL_AUTOFD 0x2
#define PARPORT_CONTROL_INIT 0x4
#define PARPORT_CONTROL_SELECT 0x8
#define PARPORT_STATUS_ERROR 0x8
#define PARPORT_STATUS_SELECT 0x10
#define PARPORT_STATUS_PAPEROUT 0x20
#define PARPORT_STATUS_ACK 0x40
#define PARPORT_STATUS_BUSY 0x80
/* Type classes for Plug-and-Play probe. */
typedef enum {
PARPORT_CLASS_LEGACY = 0, /* Non-IEEE1284 device */
PARPORT_CLASS_PRINTER,
PARPORT_CLASS_MODEM,
PARPORT_CLASS_NET,
PARPORT_CLASS_HDC, /* Hard disk controller */
PARPORT_CLASS_PCMCIA,
PARPORT_CLASS_MEDIA, /* Multimedia device */
PARPORT_CLASS_FDC, /* Floppy disk controller */
PARPORT_CLASS_PORTS,
PARPORT_CLASS_SCANNER,
PARPORT_CLASS_DIGCAM,
PARPORT_CLASS_OTHER, /* Anything else */
PARPORT_CLASS_UNSPEC, /* No CLS field in ID */
PARPORT_CLASS_SCSIADAPTER
} parport_device_class;
/* The "modes" entry in parport is a bit field representing the
capabilities of the hardware. */
#define PARPORT_MODE_PCSPP (1<<0) /* IBM PC registers available. */
#define PARPORT_MODE_TRISTATE (1<<1) /* Can tristate. */
#define PARPORT_MODE_EPP (1<<2) /* Hardware EPP. */
#define PARPORT_MODE_ECP (1<<3) /* Hardware ECP. */
#define PARPORT_MODE_COMPAT (1<<4) /* Hardware 'printer protocol'. */
#define PARPORT_MODE_DMA (1<<5) /* Hardware can DMA. */
#define PARPORT_MODE_SAFEININT (1<<6) /* SPP registers accessible in IRQ. */
/* IEEE1284 modes:
Nibble mode, byte mode, ECP, ECPRLE and EPP are their own
'extensibility request' values. Others are special.
'Real' ECP modes must have the IEEE1284_MODE_ECP bit set. */
#define IEEE1284_MODE_NIBBLE 0
#define IEEE1284_MODE_BYTE (1<<0)
#define IEEE1284_MODE_COMPAT (1<<8)
#define IEEE1284_MODE_BECP (1<<9) /* Bounded ECP mode */
#define IEEE1284_MODE_ECP (1<<4)
#define IEEE1284_MODE_ECPRLE (IEEE1284_MODE_ECP | (1<<5))
#define IEEE1284_MODE_ECPSWE (1<<10) /* Software-emulated */
#define IEEE1284_MODE_EPP (1<<6)
#define IEEE1284_MODE_EPPSL (1<<11) /* EPP 1.7 */
#define IEEE1284_MODE_EPPSWE (1<<12) /* Software-emulated */
#define IEEE1284_DEVICEID (1<<2) /* This is a flag */
#define IEEE1284_EXT_LINK (1<<14) /* This flag causes the
* extensibility link to
* be requested, using
* bits 0-6. */
/* For the benefit of parport_read/write, you can use these with
* parport_negotiate to use address operations. They have no effect
* other than to make parport_read/write use address transfers. */
#define IEEE1284_ADDR (1<<13) /* This is a flag */
#define IEEE1284_DATA 0 /* So is this */
/* Flags for block transfer operations. */
#define PARPORT_EPP_FAST (1<<0) /* Unreliable counts. */
#define PARPORT_W91284PIC (1<<1) /* have a Warp9 w91284pic in the device */
/* The rest is for the kernel only */
#endif /* _PARPORT_H_ */