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freebsd-nq/sys/dev/ata/ata-all.h
Søren Schmidt 3427651043 Ten'th update to the new ATA/ATAPI driver: 
It been awhile since the last major update, as a benefit there
are some cool things in this one (and new bugs probably :) )...

The ATA driver has grown "real" timeout support for all devices.
This means that it should be possible to get in contact with
(especially) lost ATAPI devices. It also means that the ATA
driver is now usable on notebooks as it will DTRT on resume.

An experimental hack at utilizing the Promise66's at UDMA66 is
in there, but I cant test it. If someone feels like sending
me one, give me a ping.

The ATAPI DMA enableling scheme has been changed, also better DMA
support for the Aladdin chipset has been implemented for ATAPI
devices. Note that the Aladdin apparently only can do DMA reads
on ATAPI devices, and the Promise cant do ATAPI DMA at all.
I have seen problems on some ATAPI devices that should be able
to run in DMA mode, so if you encounter problems with hanging
atapi devices during the probe, or during access, disable DMA
in atapi-all.c, and let me know. It might be nessesary to do this
via a "white list" for known good devices...

The ATAPI CDROM driver can now use eject/close without hanging and
the bug that caused reading beyond the end of a CD has been fixed.
Media change is also handled proberly. DVD drives are identified
and are usable as CDROM devices at least, I dont have the HW to
test this further, see above :).

The ATAPI tape driver has gotten some support for using the DSC
method for not blocking the IDE channel during read/write when
the device has full buffers. It knows about the OnStream DI-30
device, support is not completed yet, but it can function as a
primitive backup medium, without filemarks, and without bad media
handeling. This is because the OnStream device doesn't handle this
(like everybody else) in HW. It also now supports getting/setting
the record position on devices that supports it.

Some rather major cleanups and rearrangements as well (cvs -b diff
is your freind). I'm closing in on declaring this for beta code,
most of the infrastruture is in place by now.

As usual USE AT YOUR OWN RISK!!, this is still alpha level code.
This driver can hose your disk real bad if anything goes wrong, but
now you have been warned :)

But please tell me how it works for you!

Enjoy!

-Søren
1999-09-21 19:50:40 +00:00

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/*-
* Copyright (c) 1998,1999 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/* ATA register defines */
#define ATA_DATA 0x00 /* data register */
#define ATA_ERROR 0x01 /* (R) error register */
#define ATA_FEATURE 0x01 /* (W) feature register */
#define ATA_F_DMA 0x01 /* enable DMA */
#define ATA_F_OVL 0x02 /* enable overlap */
#define ATA_COUNT 0x02 /* (W) sector count */
#define ATA_IREASON 0x02 /* (R) interrupt reason */
#define ATA_I_CMD 0x01 /* cmd (1) | data (0) */
#define ATA_I_IN 0x02 /* read (1) | write (0) */
#define ATA_I_RELEASE 0x04 /* released bus (1) */
#define ATA_I_TAGMASK 0xf8 /* tag mask */
#define ATA_SECTOR 0x03 /* sector # */
#define ATA_CYL_LSB 0x04 /* cylinder# LSB */
#define ATA_CYL_MSB 0x05 /* cylinder# MSB */
#define ATA_DRIVE 0x06 /* Sector/Drive/Head register */
#define ATA_D_LBA 0x40 /* use LBA adressing */
#define ATA_D_IBM 0xa0 /* 512 byte sectors, ECC */
#define ATA_CMD 0x07 /* command register */
#define ATA_C_ATAPI_RESET 0x08 /* reset ATAPI device */
#define ATA_C_READ 0x20 /* read command */
#define ATA_C_WRITE 0x30 /* write command */
#define ATA_C_PACKET_CMD 0xa0 /* packet command */
#define ATA_C_ATAPI_IDENTIFY 0xa1 /* get ATAPI params*/
#define ATA_C_READ_MULTI 0xc4 /* read multi command */
#define ATA_C_WRITE_MULTI 0xc5 /* write multi command */
#define ATA_C_SET_MULTI 0xc6 /* set multi size command */
#define ATA_C_READ_DMA 0xc8 /* read w/DMA command */
#define ATA_C_WRITE_DMA 0xca /* write w/DMA command */
#define ATA_C_ATA_IDENTIFY 0xec /* get ATA params */
#define ATA_C_SETFEATURES 0xef /* features command */
#define ATA_C_FEA_SETXFER 0x03 /* set transfer mode */
#define ATA_STATUS 0x07 /* status register */
#define ATA_S_ERROR 0x01 /* error */
#define ATA_S_INDEX 0x02 /* index */
#define ATA_S_CORR 0x04 /* data corrected */
#define ATA_S_DRQ 0x08 /* data request */
#define ATA_S_DSC 0x10 /* drive seek completed */
#define ATA_S_SERV 0x10 /* drive needs service */
#define ATA_S_DWF 0x20 /* drive write fault */
#define ATA_S_DMRD 0x20 /* DMA ready */
#define ATA_S_DRDY 0x40 /* drive ready */
#define ATA_S_BSY 0x80 /* busy */
#define ATA_ALTPORT 0x206 /* alternate Status register */
#define ATA_A_IDS 0x02 /* disable interrupts */
#define ATA_A_RESET 0x04 /* RESET controller */
#define ATA_A_4BIT 0x08 /* 4 head bits */
/* misc defines */
#define ATA_MASTER 0x00
#define ATA_SLAVE 0x10
#define ATA_IOSIZE 0x08
#define ATA_OP_FINISHED 0x00
#define ATA_OP_CONTINUES 0x01
/* busmaster DMA related defines */
#define ATA_BM_OFFSET1 0x08
#define ATA_DMA_ENTRIES 256
#define ATA_DMA_EOT 0x80000000
#define ATA_BMCMD_PORT 0x00
#define ATA_BMCMD_START_STOP 0x01
#define ATA_BMCMD_WRITE_READ 0x08
#define ATA_BMSTAT_PORT 0x02
#define ATA_BMSTAT_ACTIVE 0x01
#define ATA_BMSTAT_ERROR 0x02
#define ATA_BMSTAT_INTERRUPT 0x04
#define ATA_BMSTAT_MASK 0x07
#define ATA_BMSTAT_DMA_MASTER 0x20
#define ATA_BMSTAT_DMA_SLAVE 0x40
#define ATA_BMDTP_PORT 0x04
/* structure for holding DMA address data */
struct ata_dmaentry {
u_int32_t base;
u_int32_t count;
};
/* ATA device DMA access modes */
#define ATA_WDMA2 0x22
#define ATA_UDMA2 0x42
#define ATA_UDMA4 0x44
/* structure describing an ATA device */
struct ata_softc {
int32_t unit; /* unit on this controller */
int32_t lun; /* logical unit # */
struct device *dev; /* device handle */
int32_t ioaddr; /* port addr */
int32_t altioaddr; /* alternate port addr */
int32_t bmaddr; /* bus master DMA port */
void *dev_softc[2]; /* ptr to devices softc's */
struct ata_dmaentry *dmatab[2]; /* DMA transfer tables */
int32_t mode[2]; /* transfer mode for devices */
#define ATA_MODE_PIO 0x00
#define ATA_MODE_DMA 0x01
#define ATA_MODE_UDMA33 0x02
#define ATA_MODE_UDMA66 0x04
int32_t flags; /* controller flags */
#define ATA_ATAPI_DMA_RO 0x01
int32_t devices; /* what is present */
#define ATA_ATA_MASTER 0x01
#define ATA_ATA_SLAVE 0x02
#define ATA_ATAPI_MASTER 0x04
#define ATA_ATAPI_SLAVE 0x08
u_int8_t status; /* last controller status */
u_int8_t error; /* last controller error */
int32_t active; /* active processing request */
#define ATA_IDLE 0x0
#define ATA_IMMEDIATE 0x0
#define ATA_WAIT_INTR 0x1
#define ATA_IGNORE_INTR 0x2
#define ATA_ACTIVE_ATA 0x3
#define ATA_ACTIVE_ATAPI 0x4
TAILQ_HEAD(, ad_request) ata_queue; /* head of ATA queue */
TAILQ_HEAD(, atapi_request) atapi_queue; /* head of ATAPI queue */
void *running; /* currently running request */
#if NAPM > 0
struct apmhook resume_hook; /* hook for apm */
#endif
};
#define MAXATA 8
extern struct ata_softc *atadevices[];
/* public prototypes */
void ata_start(struct ata_softc *);
void ata_reset(struct ata_softc *, int32_t *);
int32_t ata_reinit(struct ata_softc *);
int32_t ata_wait(struct ata_softc *, int32_t, u_int8_t);
int32_t ata_command(struct ata_softc *, int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, u_int32_t, int32_t);
int32_t ata_dmainit(struct ata_softc *, int32_t, int32_t, int32_t, int32_t);
int32_t ata_dmasetup(struct ata_softc *, int32_t, int8_t *, int32_t, int32_t);
void ata_dmastart(struct ata_softc *, int32_t);
int32_t ata_dmastatus(struct ata_softc *, int32_t);
int32_t ata_dmadone(struct ata_softc *, int32_t);
int8_t *ata_mode2str(int32_t);
void bswap(int8_t *, int32_t);
void btrim(int8_t *, int32_t);
void bpack(int8_t *, int8_t *, int32_t);
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