File: [local] / sys / dev / ic / wdcvar.h (download)
Revision 1.1, Tue Mar 4 16:11:11 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: wdcvar.h,v 1.41 2007/05/08 16:07:03 deraadt Exp $ */
/* $NetBSD: wdcvar.h,v 1.17 1999/04/11 20:50:29 bouyer Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum, by Onno van der Linden and by 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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_IC_WDCVAR_H_
#define _DEV_IC_WDCVAR_H_
#include <sys/timeout.h>
struct channel_queue { /* per channel queue (may be shared) */
TAILQ_HEAD(xferhead, wdc_xfer) sc_xfer;
};
struct channel_softc_vtbl;
#define WDC_OPTION_PROBE_VERBOSE 0x10000
struct channel_softc { /* Per channel data */
struct channel_softc_vtbl *_vtbl;
/* Our location */
int channel;
/* Our controller's softc */
struct wdc_softc *wdc;
/* Our registers */
bus_space_tag_t cmd_iot;
bus_space_handle_t cmd_ioh;
bus_space_tag_t ctl_iot;
bus_space_handle_t ctl_ioh;
/* data32{iot,ioh} are only used for 32 bit xfers */
bus_space_tag_t data32iot;
bus_space_handle_t data32ioh;
/* Our state */
int ch_flags;
#define WDCF_ACTIVE 0x01 /* channel is active */
#define WDCF_ONESLAVE 0x02 /* slave-only channel */
#define WDCF_IRQ_WAIT 0x10 /* controller is waiting for irq */
#define WDCF_DMA_WAIT 0x20 /* controller is waiting for DMA */
#define WDCF_VERBOSE_PROBE 0x40 /* verbose probe */
u_int8_t ch_status; /* copy of status register */
u_int8_t ch_prev_log_status; /* previous logged value of status reg */
u_int8_t ch_log_idx;
u_int8_t ch_error; /* copy of error register */
/* per-drive infos */
struct ata_drive_datas ch_drive[2];
/*
* channel queues. May be the same for all channels, if hw channels
* are not independent.
*/
struct channel_queue *ch_queue;
struct timeout ch_timo;
};
/*
* Disk Controller register definitions.
*/
#define _WDC_REGMASK 7
#define _WDC_AUX 8
#define _WDC_RDONLY 16
#define _WDC_WRONLY 32
enum wdc_regs {
wdr_error = _WDC_RDONLY | 1,
wdr_precomp = _WDC_WRONLY | 1,
wdr_features = _WDC_WRONLY | 1,
wdr_seccnt = 2,
wdr_ireason = 2,
wdr_sector = 3,
wdr_lba_lo = 3,
wdr_cyl_lo = 4,
wdr_lba_mi = 4,
wdr_cyl_hi = 5,
wdr_lba_hi = 5,
wdr_sdh = 6,
wdr_status = _WDC_RDONLY | 7,
wdr_command = _WDC_WRONLY | 7,
wdr_altsts = _WDC_RDONLY | _WDC_AUX,
wdr_ctlr = _WDC_WRONLY | _WDC_AUX
};
#define WDC_NREG 8 /* number of command registers */
#define WDC_NSHADOWREG 2 /* number of command "shadow" registers */
struct channel_softc_vtbl {
u_int8_t (*read_reg)(struct channel_softc *, enum wdc_regs reg);
void (*write_reg)(struct channel_softc *, enum wdc_regs reg,
u_int8_t var);
void (*lba48_write_reg)(struct channel_softc *, enum wdc_regs reg,
u_int16_t var);
void (*read_raw_multi_2)(struct channel_softc *,
void *data, unsigned int nbytes);
void (*write_raw_multi_2)(struct channel_softc *,
void *data, unsigned int nbytes);
void (*read_raw_multi_4)(struct channel_softc *,
void *data, unsigned int nbytes);
void (*write_raw_multi_4)(struct channel_softc *,
void *data, unsigned int nbytes);
};
#define CHP_READ_REG(chp, a) ((chp)->_vtbl->read_reg)(chp, a)
#define CHP_WRITE_REG(chp, a, b) ((chp)->_vtbl->write_reg)(chp, a, b)
#define CHP_LBA48_WRITE_REG(chp, a, b) \
((chp)->_vtbl->lba48_write_reg)(chp, a, b)
#define CHP_READ_RAW_MULTI_2(chp, a, b) \
((chp)->_vtbl->read_raw_multi_2)(chp, a, b)
#define CHP_WRITE_RAW_MULTI_2(chp, a, b) \
((chp)->_vtbl->write_raw_multi_2)(chp, a, b)
#define CHP_READ_RAW_MULTI_4(chp, a, b) \
((chp)->_vtbl->read_raw_multi_4)(chp, a, b)
#define CHP_WRITE_RAW_MULTI_4(chp, a, b) \
((chp)->_vtbl->write_raw_multi_4)(chp, a, b)
struct wdc_softc { /* Per controller state */
struct device sc_dev;
/* mandatory fields */
int cap;
/* Capabilities supported by the controller */
#define WDC_CAPABILITY_DATA16 0x0001 /* can do 16-bit data access */
#define WDC_CAPABILITY_DATA32 0x0002 /* can do 32-bit data access */
#define WDC_CAPABILITY_MODE 0x0004 /* controller knows its PIO/DMA modes */
#define WDC_CAPABILITY_DMA 0x0008 /* DMA */
#define WDC_CAPABILITY_UDMA 0x0010 /* Ultra-DMA/33 */
#define WDC_CAPABILITY_HWLOCK 0x0020 /* Needs to lock HW */
#define WDC_CAPABILITY_ATA_NOSTREAM 0x0040 /* Don't use stream funcs on ATA */
#define WDC_CAPABILITY_ATAPI_NOSTREAM 0x0080 /* Don't use stream f on ATAPI */
#define WDC_CAPABILITY_NO_EXTRA_RESETS 0x0100 /* only reset once */
#define WDC_CAPABILITY_PREATA 0x0200 /* ctrl can be a pre-ata one */
#define WDC_CAPABILITY_IRQACK 0x0400 /* callback to ack interrupt */
#define WDC_CAPABILITY_SINGLE_DRIVE 0x800 /* Don't proble second drive */
#define WDC_CAPABILITY_NO_ATAPI_DMA 0x1000 /* Don't do DMA with ATAPI */
#define WDC_CAPABILITY_SATA 0x2000 /* SATA controller */
u_int8_t PIO_cap; /* highest PIO mode supported */
u_int8_t DMA_cap; /* highest DMA mode supported */
u_int8_t UDMA_cap; /* highest UDMA mode supported */
int nchannels; /* Number of channels on this controller */
struct channel_softc **channels; /* channels-specific datas (array) */
u_int16_t quirks; /* per-device oddities */
#define WDC_QUIRK_NOSHORTDMA 0x0001 /* can't do short DMA transfers */
#if 0
/*
* The reference count here is used for both IDE and ATAPI devices.
*/
struct scsipi_adapter sc_atapi_adapter;
#endif
/* if WDC_CAPABILITY_DMA set in 'cap' */
void *dma_arg;
int (*dma_init)(void *, int, int, void *, size_t,
int);
void (*dma_start)(void *, int, int);
int (*dma_finish)(void *, int, int, int);
/* flags passed to DMA functions */
#define WDC_DMA_READ 0x01
#define WDC_DMA_IRQW 0x02
#define WDC_DMA_LBA48 0x04
int dma_status; /* status return from dma_finish() */
#define WDC_DMAST_NOIRQ 0x01 /* missing IRQ */
#define WDC_DMAST_ERR 0x02 /* DMA error */
#define WDC_DMAST_UNDER 0x04 /* DMA underrun */
/* if WDC_CAPABILITY_HWLOCK set in 'cap' */
int (*claim_hw)(void *, int);
void (*free_hw)(void *);
/* if WDC_CAPABILITY_MODE set in 'cap' */
void (*set_modes)(struct channel_softc *);
/* if WDC_CAPABILITY_IRQACK set in 'cap' */
void (*irqack)(struct channel_softc *);
void (*reset)(struct channel_softc *);
/* Driver callback to probe for drives */
void (*drv_probe)(struct channel_softc *);
};
/*
* Description of a command to be handled by a controller.
* These commands are queued in a list.
*/
struct atapi_return_args;
struct wdc_xfer {
volatile u_int c_flags;
#define C_ATAPI 0x0002 /* xfer is ATAPI request */
#define C_TIMEOU 0x0004 /* xfer processing timed out */
#define C_NEEDDONE 0x0010 /* need to call upper-level done */
#define C_POLL 0x0020 /* cmd is polled */
#define C_DMA 0x0040 /* cmd uses DMA */
#define C_SENSE 0x0080 /* cmd is a internal command */
#define C_MEDIA_ACCESS 0x0100 /* is a media access command */
#define C_POLL_MACHINE 0x0200 /* machine has a poll hander */
/* Informations about our location */
struct channel_softc *chp;
u_int8_t drive;
/* Information about the current transfer */
void *cmd; /* wdc, ata or scsipi command structure */
void *databuf;
int c_bcount; /* byte count left */
int c_skip; /* bytes already transferred */
TAILQ_ENTRY(wdc_xfer) c_xferchain;
LIST_ENTRY(wdc_xfer) free_list;
void (*c_start)(struct channel_softc *, struct wdc_xfer *);
int (*c_intr)(struct channel_softc *, struct wdc_xfer *, int);
void (*c_kill_xfer)(struct channel_softc *, struct wdc_xfer *);
/* Used by ATAPISCSI */
volatile int endticks;
struct timeout atapi_poll_to;
void (*next)(struct channel_softc *, struct wdc_xfer *, int,
struct atapi_return_args *);
void (*c_done)(struct channel_softc *, struct wdc_xfer *, int,
struct atapi_return_args *);
/* Used for tape devices */
int transfer_len;
};
/*
* Public functions which can be called by ATA or ATAPI specific parts,
* or bus-specific backends.
*/
int wdcprobe(struct channel_softc *);
void wdcattach(struct channel_softc *);
int wdcdetach(struct channel_softc *, int);
int wdcactivate(struct device *, enum devact);
int wdcintr(void *);
void wdc_exec_xfer(struct channel_softc *, struct wdc_xfer *);
struct wdc_xfer *wdc_get_xfer(int); /* int = WDC_NOSLEEP/CANSLEEP */
#define WDC_CANSLEEP 0x00
#define WDC_NOSLEEP 0x01
void wdc_free_xfer(struct channel_softc *, struct wdc_xfer *);
void wdcstart(struct channel_softc *);
int wdcreset(struct channel_softc *, int);
#define VERBOSE 1
#define SILENT 0 /* wdcreset will not print errors */
int wdc_wait_for_status(struct channel_softc *, int, int, int);
int wdc_dmawait(struct channel_softc *, struct wdc_xfer *, int);
void wdcbit_bucket(struct channel_softc *, int);
void wdccommand(struct channel_softc *, u_int8_t, u_int8_t, u_int16_t,
u_int8_t, u_int8_t, u_int8_t, u_int8_t);
void wdccommandext(struct channel_softc *, u_int8_t, u_int8_t, u_int64_t,
u_int16_t);
void wdccommandshort(struct channel_softc *, int, int);
void wdctimeout(void *arg);
void wdc_do_reset(struct channel_softc *);
int wdc_addref(struct channel_softc *);
void wdc_delref(struct channel_softc *);
/*
* ST506 spec says that if READY or SEEKCMPLT go off, then the read or write
* command is aborted.
*/
#define wdcwait(chp, status, mask, timeout) ((wdc_wait_for_status((chp), (status), (mask), (timeout)) >= 0) ? 0 : -1)
#define wait_for_drq(chp, timeout) wdcwait((chp), WDCS_DRQ, WDCS_DRQ, (timeout))
#define wait_for_unbusy(chp, timeout) wdcwait((chp), 0, 0, (timeout))
#define wait_for_ready(chp, timeout) wdcwait((chp), WDCS_DRDY, \
WDCS_DRDY, (timeout))
/* ATA/ATAPI specs says a device can take 31s to reset */
#define WDC_RESET_WAIT 31000
void wdc_disable_intr(struct channel_softc *);
void wdc_enable_intr(struct channel_softc *);
int wdc_select_drive(struct channel_softc *, int, int);
void wdc_set_drive(struct channel_softc *, int drive);
void wdc_output_bytes(struct ata_drive_datas *drvp, void *, unsigned int);
void wdc_input_bytes(struct ata_drive_datas *drvp, void *, unsigned int);
void wdc_print_current_modes(struct channel_softc *);
int wdc_ioctl(struct ata_drive_datas *, u_long, caddr_t, int, struct proc *);
u_int8_t wdc_default_read_reg(struct channel_softc *,
enum wdc_regs);
void wdc_default_write_reg(struct channel_softc *,
enum wdc_regs, u_int8_t);
void wdc_default_lba48_write_reg(struct channel_softc *,
enum wdc_regs, u_int16_t);
void wdc_default_read_raw_multi_2(struct channel_softc *,
void *, unsigned int);
void wdc_default_write_raw_multi_2(struct channel_softc *,
void *, unsigned int);
void wdc_default_read_raw_multi_4(struct channel_softc *,
void *, unsigned int);
void wdc_default_write_raw_multi_4(struct channel_softc *,
void *, unsigned int);
#endif /* !_DEV_IC_WDCVAR_H_ */
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