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chipset. This does not attempt to do anything special with the timing on the hope that the BIOS will have done the right thing already. The actual interface from the wd driver to the new facility is not implemented yet (this commit being an attempt at prodding someone else to do it because looking at the wd driver always confuses the h*** out of me).
191 lines
7.4 KiB
C
191 lines
7.4 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: wdreg.h,v 1.10 1995/11/04 17:07:58 bde Exp $
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*/
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/*
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* Disk Controller register definitions.
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*/
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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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/*
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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\006rdy\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 */
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short wdp_fixedcyl; /* number of non-removable cylinders */
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short wdp_removcyl; /* number of removable cylinders */
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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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short wdp_sectors; /* number of sectors */
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short wdp_minisg; /* minimum bytes in inter-sector gap*/
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short wdp_minplo; /* minimum bytes in postamble */
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short wdp_vendstat; /* number of words of vendor status */
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/* controller info */
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char wdp_cnsn[20]; /* controller serial number */
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short wdp_cntype; /* controller 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_cnsbsz; /* sector buffer size, in sectors */
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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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