219 lines
8.4 KiB
C
219 lines
8.4 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)wdreg.h 7.1 (Berkeley) 5/9/91
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* $Id$
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*/
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/*
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* modified for PC9801 by F.Ukai
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* Kyoto University Microcomputer Club (KMC)
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*/
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/*
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* Disk Controller register definitions.
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*/
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#ifdef PC98
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#define wd_data 0x0 /* data register (R/W - 16 bits) */
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#define wd_error 0x2 /* error register (R) */
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#define wd_precomp wd_error /* write precompensation (W) */
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#define wd_features wd_error /* features register (W) */
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#define wd_seccnt 0x4 /* sector count (R/W) */
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#define wd_sector 0x6 /* first sector number (R/W) */
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#define wd_cyl_lo 0x8 /* cylinder address, low byte (R/W) */
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#define wd_cyl_hi 0xa /* cylinder address, high byte (R/W)*/
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#define wd_sdh 0xc /* sector size/drive/head (R/W)*/
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#define wd_command 0xe /* command register (W) */
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#define wd_status wd_command /* immediate status (R) */
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#define wd_altsts_nec 0x10c /*alternate fixed disk status(via 1015) (R)*/
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#define wd_ctlr_nec 0x10c /*fixed disk controller control(via 1015) (W)*/
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#define wd_altsts_epson 0x3 /*alternate fixed disk status(via 1015) (R)*/
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#define wd_ctlr_epson 0x3 /*fixed disk controller control(via 1015) (W)*/
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#define wd_altsts wd_alsts_nec
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#define WDCTL_4BIT 0x8 /* use four head bits (wd1003) */
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#define WDCTL_RST 0x4 /* reset the controller */
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#define WDCTL_IDS 0x2 /* disable controller interrupts */
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#define wd_digin 0x10e /* disk controller input(via 1015) (R)*/
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#else /* IBM-PC */
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#define wd_data 0x0 /* data register (R/W - 16 bits) */
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#define wd_error 0x1 /* error register (R) */
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#define wd_precomp wd_error /* write precompensation (W) */
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#define wd_features wd_error /* features register (W) */
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#define wd_seccnt 0x2 /* sector count (R/W) */
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#define wd_sector 0x3 /* first sector number (R/W) */
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#define wd_cyl_lo 0x4 /* cylinder address, low byte (R/W) */
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#define wd_cyl_hi 0x5 /* cylinder address, high byte (R/W)*/
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#define wd_sdh 0x6 /* sector size/drive/head (R/W)*/
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#define wd_command 0x7 /* command register (W) */
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#define wd_status wd_command /* immediate status (R) */
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#define wd_altsts 0x206 /*alternate fixed disk status(via 1015) (R)*/
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#define wd_ctlr 0x206 /*fixed disk controller control(via 1015) (W)*/
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#define WDCTL_4BIT 0x8 /* use four head bits (wd1003) */
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#define WDCTL_RST 0x4 /* reset the controller */
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#define WDCTL_IDS 0x2 /* disable controller interrupts */
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#define wd_digin 0x207 /* disk controller input(via 1015) (R)*/
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#endif /* PC98 */
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/*
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* Status Bits.
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*/
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#define WDCS_BUSY 0x80 /* Controller busy bit. */
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#define WDCS_READY 0x40 /* Selected drive is ready */
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#define WDCS_WRTFLT 0x20 /* Write fault */
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#define WDCS_SEEKCMPLT 0x10 /* Seek complete */
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#define WDCS_DRQ 0x08 /* Data request bit. */
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#define WDCS_ECCCOR 0x04 /* ECC correction made in data */
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#define WDCS_INDEX 0x02 /* Index pulse from selected drive */
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#define WDCS_ERR 0x01 /* Error detect bit. */
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#define WDCS_BITS "\020\010busy\007rdy\006wrtflt\005seekdone\004drq\003ecc_cor\002index\001err"
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#define WDERR_ABORT 0x04
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#define WDERR_BITS "\020\010badblk\007uncorr\006id_crc\005no_id\003abort\002tr000\001no_dam"
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/*
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* Commands for Disk Controller.
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*/
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#define WDCC_RESTORE 0x10 /* disk restore code -- resets cntlr */
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#define WDCC_READ 0x20 /* disk read code */
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#define WDCC_WRITE 0x30 /* disk write code */
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#define WDCC__LONG 0x02 /* modifier -- access ecc bytes */
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#define WDCC__NORETRY 0x01 /* modifier -- no retrys */
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#define WDCC_FORMAT 0x50 /* disk format code */
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#define WDCC_DIAGNOSE 0x90 /* controller diagnostic */
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#define WDCC_IDC 0x91 /* initialize drive command */
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#define WDCC_READ_MULTI 0xC4 /* read multiple */
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#define WDCC_WRITE_MULTI 0xC5 /* write multiple */
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#define WDCC_SET_MULTI 0xC6 /* set multiple count */
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#define WDCC_EXTDCMD 0xE0 /* send extended command */
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#define WDCC_READP 0xEC /* read parameters from controller */
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#define WDCC_FEATURES 0xEF /* features control */
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#define WDFEA_RCACHE 0xAA /* read cache enable */
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#define WDFEA_WCACHE 0x02 /* write cache enable */
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#define WD_STEP 0 /* winchester- default 35us step */
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#define WDSD_IBM 0xa0 /* forced to 512 byte sector, ecc */
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#ifdef KERNEL
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/*
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* read parameters command returns this:
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*/
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struct wdparams {
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/* drive info */
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short wdp_config; /* general configuration bits */
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u_short wdp_cylinders; /* number of cylinders */
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short wdp_reserved;
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u_short wdp_heads; /* number of heads */
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short wdp_unfbytespertrk; /* number of unformatted bytes/track */
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short wdp_unfbytes; /* number of unformatted bytes/sector */
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u_short wdp_sectors; /* number of sectors per track */
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short wdp_vendorunique[3];
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/* controller info */
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char wdp_serial[20]; /* serial number */
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short wdp_buffertype; /* buffer type */
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#define WDTYPE_SINGLEPORTSECTOR 1 /* single port, single sector buffer */
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#define WDTYPE_DUALPORTMULTI 2 /* dual port, multiple sector buffer */
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#define WDTYPE_DUALPORTMULTICACHE 3 /* above plus track cache */
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short wdp_buffersize; /* buffer size, in 512-byte units */
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short wdp_necc; /* ecc bytes appended */
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char wdp_rev[8]; /* firmware revision */
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char wdp_model[40]; /* model name */
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short wdp_nsecperint; /* sectors per interrupt */
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short wdp_usedmovsd; /* can use double word read/write? */
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};
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/*
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* wd driver entry points
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*/
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#ifdef B_FORMAT
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int wdformat(struct buf *bp);
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#endif
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/*
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* IDE DMA support.
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* This is based on what is needed for the IDE DMA function of the Intel
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* Triton chipset; hopefully it's general enough to be used for other
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* chipsets as well.
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*
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* To use this:
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* For each drive which you might want to do DMA on, call wdd_candma()
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* to get a cookie. If it returns a null pointer, then the drive
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* can't do DMA.
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*
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* Set up the transfer be calling wdd_dmaprep(). The cookie is what
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* you got before; vaddr is the virtual address of the buffer to be
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* written; len is the length of the buffer; and direction is either
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* B_READ or B_WRITE.
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*
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* Send a read/write DMA command to the drive.
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*
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* Call wdd_dmastart().
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*
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* Wait for an interrupt. Multi-sector transfers will only interrupt
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* at the end of the transfer.
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*
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* Call wdd_dmadone(). It will return the status as defined by the
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* WDDS_* constants below.
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*/
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struct wddma {
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void *(*wdd_candma) /* returns a cookie if can do DMA */
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__P((int ctlr, int drive));
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int (*wdd_dmaprep) /* prepare DMA hardware */
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__P((void *cookie, char *vaddr, u_long len, int direction));
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void (*wdd_dmastart) /* begin DMA transfer */
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__P((void *cookie));
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int (*wdd_dmadone) /* DMA transfer completed */
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__P((void *cookie));
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int (*wdd_dmastatus) /* return status of DMA */
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__P((void *cookie));
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};
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#define WDDS_ACTIVE 0x0001
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#define WDDS_ERROR 0x0002
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#define WDDS_INTERRUPT 0x0004
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extern struct wddma wddma;
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#endif /* KERNEL */
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