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/* $OpenBSD: atavar.h,v 1.20 2011/04/15 20:53:28 miod Exp $ */
/* $NetBSD: atavar.h,v 1.13 1999/03/10 13:11:43 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 Manuel Bouyer.
*
* 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.
* 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.
*
* 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.
*
*/
#ifndef _DEV_ATA_ATAVAR_H_
#define _DEV_ATA_ATAVAR_H_
/* High-level functions and structures used by both ATA and ATAPI devices */
#include <dev/ata/atareg.h>
/* Datas common to drives and controller drivers */
struct ata_drive_datas {
u_int8_t drive; /* drive number */
int8_t ata_vers; /* ATA version supported */
u_int16_t drive_flags; /* bitmask for drives present/absent and cap */
#define DRIVE_ATA 0x0001
#define DRIVE_ATAPI 0x0002
#define DRIVE_OLD 0x0004
#define DRIVE (DRIVE_ATA|DRIVE_ATAPI|DRIVE_OLD)
#define DRIVE_CAP32 0x0008
#define DRIVE_DMA 0x0010
#define DRIVE_UDMA 0x0020
#define DRIVE_MODE 0x0040 /* the drive reported its mode */
#define DRIVE_RESET 0x0080 /* reset the drive state at next xfer */
#define DRIVE_DMAERR 0x0100 /* Udma transfer had crc error, don't try DMA */
#define DRIVE_DSCBA 0x0200 /* DSC in buffer availability mode */
#define DRIVE_DSCWAIT 0x0400 /* In wait for DSC to be asserted */
#define DRIVE_DEVICE_RESET 0x0800 /* Drive supports DEVICE RESET command */
#define DRIVE_SATA 0x1000 /* SATA drive */
/*
* Current setting of drive's PIO, DMA and UDMA modes.
* Is initialised by the disks drivers at attach time, and may be
* changed later by the controller's code if needed
*/
u_int8_t PIO_mode; /* Current setting of drive's PIO mode */
u_int8_t DMA_mode; /* Current setting of drive's DMA mode */
u_int8_t UDMA_mode; /* Current setting of drive's UDMA mode */
/* Supported modes for this drive */
u_int8_t PIO_cap; /* supported drive's PIO mode */
u_int8_t DMA_cap; /* supported drive's DMA mode */
u_int8_t UDMA_cap; /* supported drive's UDMA mode */
/*
* Drive state. This is drive-type (ATA or ATAPI) dependant
* This is reset to 0 after a channel reset.
*/
u_int8_t state;
#define ACAP_LEN 0x01 /* 16 byte commands */
#define ACAP_DSC 0x02 /* use DSC signalling */
/* 0x20-0x40 reserved for ATAPI_CFG_DRQ_MASK */
u_int8_t atapi_cap;
/* Keeps track of the number of resets that have occurred in a row
without a successful command completion. */
u_int8_t n_resets;
u_int8_t n_dmaerrs;
u_int32_t n_xfers;
#define NERRS_MAX 4
#define NXFER 1000
char drive_name[31];
int cf_flags;
void *chnl_softc; /* channel softc */
struct ataparams id;
};
/* ATA/ATAPI common attachement datas */
struct ata_atapi_attach {
u_int8_t aa_type; /* Type of device */
#define T_ATA 0
#define T_ATAPI 1
u_int8_t aa_channel; /* controller's channel */
u_int8_t aa_openings; /* Number of simultaneous commands possible */
struct ata_drive_datas *aa_drv_data;
void *aa_bus_private; /* infos specifics to this bus */
};
/* User config flags that force (or disable) the use of a mode */
#define ATA_CONFIG_PIO_MODES 0x0007
#define ATA_CONFIG_PIO_SET 0x0008
#define ATA_CONFIG_PIO_OFF 0
#define ATA_CONFIG_DMA_MODES 0x0070
#define ATA_CONFIG_DMA_SET 0x0080
#define ATA_CONFIG_DMA_DISABLE 0x0070
#define ATA_CONFIG_DMA_OFF 4
#define ATA_CONFIG_UDMA_MODES 0x0700
#define ATA_CONFIG_UDMA_SET 0x0800
#define ATA_CONFIG_UDMA_DISABLE 0x0700
#define ATA_CONFIG_UDMA_OFF 8
/*
* ATA/ATAPI commands description
*
* This structure defines the interface between the ATA/ATAPI device driver
* and the controller for short commands. It contains the command's parameter,
* the len of data's to read/write (if any), and a function to call upon
* completion.
* If no sleep is allowed, the driver can poll for command completion.
* Once the command completed, if the error registed is valid, the flag
* AT_ERROR is set and the error register value is copied to r_error .
* A separate interface is needed for read/write or ATAPI packet commands
* (which need multiple interrupts per commands).
*/
struct wdc_command {
u_int8_t r_command; /* Parameters to upload to registers */
u_int8_t r_head;
u_int16_t r_cyl;
u_int8_t r_sector;
u_int8_t r_count;
u_int8_t r_precomp;
u_int8_t r_st_bmask; /* status register mask to wait for before command */
u_int8_t r_st_pmask; /* status register mask to wait for after command */
u_int8_t r_error; /* error register after command done */
volatile u_int16_t flags;
#define AT_READ 0x0001 /* There is data to read */
#define AT_WRITE 0x0002 /* There is data to write (excl. with AT_READ) */
#define AT_WAIT 0x0008 /* wait in controller code for command completion */
#define AT_POLL 0x0010 /* poll for command completion (no interrupts) */
#define AT_DONE 0x0020 /* command is done */
#define AT_ERROR 0x0040 /* command is done with error */
#define AT_TIMEOU 0x0080 /* command timed out */
#define AT_DF 0x0100 /* Drive fault */
#define AT_READREG 0x0200 /* Read registers on completion */
int timeout; /* timeout (in ms) */
void *data; /* Data buffer address */
int bcount; /* number of bytes to transfer */
void (*callback)(void *); /* command to call once command completed */
void *callback_arg; /* argument passed to *callback() */
};
extern int at_poll;
int wdc_exec_command(struct ata_drive_datas *, struct wdc_command*);
#define WDC_COMPLETE 0x01
#define WDC_QUEUED 0x02
#define WDC_TRY_AGAIN 0x03
void wdc_probe_caps(struct ata_drive_datas*, struct ataparams *);
void wdc_print_caps(struct ata_drive_datas*);
int wdc_downgrade_mode(struct ata_drive_datas*);
void wdc_reset_channel(struct ata_drive_datas *, int);
int wdc_ata_addref(struct ata_drive_datas *);
void wdc_ata_delref(struct ata_drive_datas *);
void wdc_ata_kill_pending(struct ata_drive_datas *);
int ata_get_params(struct ata_drive_datas*, u_int8_t,
struct ataparams *);
int ata_set_mode(struct ata_drive_datas*, u_int8_t, u_int8_t);
/* return code for these cmds */
#define CMD_OK 0
#define CMD_ERR 1
#define CMD_AGAIN 2
void ata_dmaerr(struct ata_drive_datas *);
void ata_perror(struct ata_drive_datas *, int, char *, size_t);
#endif /* !_DEV_ATA_ATAVAR_H_ */
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