/*

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* Any part of this program may be used in documents licensed under

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* the GNU Free Documentation License, Version 1.1 or any later version

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* published by the Free Software Foundation.

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*/

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#ifndef _PARPORT_H_

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#define _PARPORT_H_

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/* Start off with user-visible constants */

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/* Maximum of 16 ports per machine */

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#define PARPORT_MAX 16

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/* Magic numbers */

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#define PARPORT_IRQ_NONE -1

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#define PARPORT_DMA_NONE -1

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#define PARPORT_IRQ_AUTO -2

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#define PARPORT_DMA_AUTO -2

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#define PARPORT_DMA_NOFIFO -3

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#define PARPORT_DISABLE -2

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#define PARPORT_IRQ_PROBEONLY -3

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#define PARPORT_IOHI_AUTO -1

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#define PARPORT_CONTROL_STROBE 0x1

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#define PARPORT_CONTROL_AUTOFD 0x2

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#define PARPORT_CONTROL_INIT 0x4

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#define PARPORT_CONTROL_SELECT 0x8

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#define PARPORT_STATUS_ERROR 0x8

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#define PARPORT_STATUS_SELECT 0x10

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#define PARPORT_STATUS_PAPEROUT 0x20

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#define PARPORT_STATUS_ACK 0x40

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#define PARPORT_STATUS_BUSY 0x80

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/* Type classes for Plug-and-Play probe. */

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typedef enum {

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PARPORT_CLASS_LEGACY = 0, /* Non-IEEE1284 device */

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PARPORT_CLASS_PRINTER,

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PARPORT_CLASS_MODEM,

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PARPORT_CLASS_NET,

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PARPORT_CLASS_HDC, /* Hard disk controller */

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PARPORT_CLASS_PCMCIA,

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PARPORT_CLASS_MEDIA, /* Multimedia device */

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PARPORT_CLASS_FDC, /* Floppy disk controller */

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PARPORT_CLASS_PORTS,

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PARPORT_CLASS_SCANNER,

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PARPORT_CLASS_DIGCAM,

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PARPORT_CLASS_OTHER, /* Anything else */

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PARPORT_CLASS_UNSPEC, /* No CLS field in ID */

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PARPORT_CLASS_SCSIADAPTER

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} parport_device_class;

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/* The "modes" entry in parport is a bit field representing the

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capabilities of the hardware. */

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#define PARPORT_MODE_PCSPP (1<<0) /* IBM PC registers available. */

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#define PARPORT_MODE_TRISTATE (1<<1) /* Can tristate. */

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#define PARPORT_MODE_EPP (1<<2) /* Hardware EPP. */

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#define PARPORT_MODE_ECP (1<<3) /* Hardware ECP. */

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#define PARPORT_MODE_COMPAT (1<<4) /* Hardware 'printer protocol'. */

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#define PARPORT_MODE_DMA (1<<5) /* Hardware can DMA. */

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#define PARPORT_MODE_SAFEININT (1<<6) /* SPP registers accessible in IRQ. */

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/* IEEE1284 modes:

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Nibble mode, byte mode, ECP, ECPRLE and EPP are their own

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'extensibility request' values. Others are special.

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'Real' ECP modes must have the IEEE1284_MODE_ECP bit set. */

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#define IEEE1284_MODE_NIBBLE 0

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#define IEEE1284_MODE_BYTE (1<<0)

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#define IEEE1284_MODE_COMPAT (1<<8)

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#define IEEE1284_MODE_BECP (1<<9) /* Bounded ECP mode */

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#define IEEE1284_MODE_ECP (1<<4)

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#define IEEE1284_MODE_ECPRLE (IEEE1284_MODE_ECP | (1<<5))

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#define IEEE1284_MODE_ECPSWE (1<<10) /* Software-emulated */

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#define IEEE1284_MODE_EPP (1<<6)

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#define IEEE1284_MODE_EPPSL (1<<11) /* EPP 1.7 */

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#define IEEE1284_MODE_EPPSWE (1<<12) /* Software-emulated */

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#define IEEE1284_DEVICEID (1<<2) /* This is a flag */

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#define IEEE1284_EXT_LINK (1<<14) /* This flag causes the

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* extensibility link to

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* be requested, using

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* bits 0-6. */

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/* For the benefit of parport_read/write, you can use these with

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* parport_negotiate to use address operations. They have no effect

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* other than to make parport_read/write use address transfers. */

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#define IEEE1284_ADDR (1<<13) /* This is a flag */

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#define IEEE1284_DATA 0 /* So is this */

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/* Flags for block transfer operations. */

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#define PARPORT_EPP_FAST (1<<0) /* Unreliable counts. */

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#define PARPORT_W91284PIC (1<<1) /* have a Warp9 w91284pic in the device */

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/* The rest is for the kernel only */

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#endif /* _PARPORT_H_ */

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