Primitive GDROM support.
This commit is contained in:
marcus
parent
28f7e6dde5
commit
36382f4889
553
sys/arch/dreamcast/dev/gdrom.c
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553
sys/arch/dreamcast/dev/gdrom.c
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@ -0,0 +1,553 @@
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/* $NetBSD: gdrom.c,v 1.1 2001/01/21 23:30:28 marcus Exp $ */
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/*-
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* Copyright (c) 2001 Marcus Comstedt
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* All rights reserved.
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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 Marcus Comstedt.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <sys/buf.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <machine/conf.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <sh3/shbvar.h>
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int gdrommatch __P((struct device *, struct cfdata *, void *));
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void gdromattach __P((struct device *, struct device *, void *));
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int gdromopen __P((dev_t, int, int, struct proc *));
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int gdromclose __P((dev_t, int, int, struct proc *));
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void gdromstrategy __P((struct buf *));
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int gdromioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
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int gdromdump __P((dev_t, daddr_t, caddr_t, size_t));
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int gdromsize __P((dev_t));
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int gdromread __P((dev_t, struct uio *, int));
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int gdromwrite __P((dev_t, struct uio *, int));
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struct gdrom_softc {
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struct device sc_dv; /* generic device info; must come first */
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struct disk dkdev; /* generic disk info */
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struct buf_queue bufq; /* queue pending I/O operations */
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struct buf curbuf; /* state of current I/O operation */
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int is_open;
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int openpart_start; /* start sector of currently open partition */
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};
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struct cfattach gdrom_ca = {
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sizeof(struct gdrom_softc), gdrommatch, gdromattach
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};
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struct dkdriver gdromdkdriver = { gdromstrategy };
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extern struct cfdriver gdrom_cd;
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struct gd_toc {
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unsigned int entry[99];
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unsigned int first, last;
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unsigned int leadout;
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};
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#define TOC_LBA(n) ((n)&0xffffff00)
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#define TOC_ADR(n) ((n)&0x0f)
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#define TOC_CTRL(n) (((n)&0xf0)>>4)
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#define TOC_TRACK(n) (((n)&0x0000ff00)>>8)
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#define GDROM(o) (*(volatile unsigned char *)(0xa05f7000+(o)))
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#define GDSTATSTAT(n) ((n)&0xf)
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#define GDSTATDISK(n) (((n)>>4)&0xf)
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#define GDROM_BUSY GDROM(0x18)
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#define GDROM_DATA (*(volatile short *)&GDROM(0x80))
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#define GDROM_REGX GDROM(0x84)
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#define GDROM_STAT GDROM(0x8c)
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#define GDROM_CNTLO GDROM(0x90)
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#define GDROM_CNTHI GDROM(0x94)
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#define GDROM_COND GDROM(0x9c)
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int gdrom_getstat __P((void));
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void gdrom_wait_irq __P((void));
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int gdrom_send_command __P((short *ptr));
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int gdrom_do_read_command __P((void *req, void *buf, unsigned int nbyt));
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int gdrom_do_nodata_command __P((void *req));
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int gdrom_check_sense __P((int cond));
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int gdrom_read_toc __P((struct gd_toc *toc));
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int gdrom_read_sectors __P((void *buf, int sector, int cnt));
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int gdrom_mount_disk __P((void));
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int gdrom_getstat()
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{
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int s1, s2, s3;
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if(GDROM_BUSY & 0x80) return -1;
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s1 = GDROM_STAT;
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s2 = GDROM_STAT;
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s3 = GDROM_STAT;
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if(GDROM_BUSY & 0x80) return -1;
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if(s1 == s2)
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return s1;
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else if(s2 == s3)
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return s2;
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else
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return -1;
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}
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void gdrom_wait_irq()
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{
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volatile unsigned int *irq = (volatile unsigned int *)0xa05f6904;
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while(!((*irq) & 1))
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;
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}
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int gdrom_send_command(ptr)
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short *ptr;
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{
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int i;
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if(GDSTATSTAT(GDROM_STAT) == 6)
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return (-1);
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GDROM_COND = 0xa0;
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for(i = 0; i < 64; i++) ;
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while( (GDROM_BUSY & 0x88) != 8 ) ;
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for(i = 0; i< 6; i++)
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GDROM_DATA = ptr[i];
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return (0);
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}
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int gdrom_do_read_command(req, buf, nbyt)
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void *req;
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void *buf;
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unsigned int nbyt;
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{
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short *ptr = buf;
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int cond;
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while( GDROM_BUSY & 0x88 ) ;
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GDROM_CNTLO = nbyt & 0xff;
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GDROM_CNTHI = (nbyt >> 8) & 0xff;
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GDROM_REGX = 0;
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if(gdrom_send_command(req)) return -1;
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do {
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gdrom_wait_irq();
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cond = GDROM_COND;
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#ifdef GDROMDEBUG
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printf("cond = %x\n", cond);
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#endif
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if((cond & 8) == 8) {
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int cnt = (GDROM_CNTHI<<8) | GDROM_CNTLO;
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#ifdef GDROMDEBUG
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printf("cnt = %d\n", cnt);
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#endif
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while(cnt > 0) {
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*ptr++ = GDROM_DATA;
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cnt -= 2;
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}
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}
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while( GDROM_BUSY & 0x80 );
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} while(cond & 8);
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return cond;
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}
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int gdrom_do_nodata_command(req)
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void *req;
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{
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int cond;
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while( GDROM_BUSY & 0x88 ) ;
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if(gdrom_send_command(req)) return -1;
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gdrom_wait_irq();
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cond = GDROM_COND;
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while( GDROM_BUSY & 0x88 ) ;
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return cond;
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}
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int gdrom_check_sense(cond)
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int cond;
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{
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/* 76543210 76543210
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0 0x13 -
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2 - bufsz(hi)
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4 bufsz(lo) -
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6 - -
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8 - -
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10 - - */
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unsigned short sense_data[5];
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unsigned char cmd[12];
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int sense_key, sense_specific;
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if(cond < 0) {
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#ifdef GDROMDEBUG
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printf("not ready (2:58)\n");
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#endif
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return EIO;
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}
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if(!(cond & 1)) {
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#ifdef GDROMDEBUG
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printf("no sense. 0:0\n");
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#endif
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return (0);
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}
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bzero(cmd, sizeof(cmd));
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cmd[0] = 0x13;
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cmd[4] = sizeof(sense_data);
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gdrom_do_read_command(cmd, sense_data, sizeof(sense_data));
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sense_key = sense_data[1] & 0xf;
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sense_specific = sense_data[4];
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if(sense_key == 11 && sense_specific == 0) {
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#ifdef GDROMDEBUG
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printf("aborted (ignored). 0:0\n");
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#endif
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return (0);
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}
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#ifdef GDROMDEBUG
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printf("SENSE %d:", sense_key);
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printf("%d\n", sense_specific);
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#endif
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return (sense_key==0? 0 : EIO);
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}
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int gdrom_read_toc(toc)
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struct gd_toc *toc;
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{
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/* 76543210 76543210
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0 0x14 -
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2 - bufsz(hi)
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4 bufsz(lo) -
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6 - -
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8 - -
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10 - - */
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unsigned char cmd[12];
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bzero(cmd, sizeof(cmd));
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cmd[0] = 0x14;
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cmd[3] = sizeof(struct gd_toc)>>8;
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cmd[4] = sizeof(struct gd_toc)&0xff;
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return gdrom_check_sense( gdrom_do_read_command(cmd, toc, sizeof(struct gd_toc)) );
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}
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int gdrom_read_sectors(buf, sector, cnt)
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void *buf;
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int sector;
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int cnt;
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{
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/* 76543210 76543210
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0 0x30 datafmt
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2 sec(hi) sec(mid)
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4 sec(lo) -
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6 - -
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8 cnt(hi) cnt(mid)
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10 cnt(lo) - */
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unsigned char cmd[12];
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bzero(cmd, sizeof(cmd));
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cmd[0] = 0x30;
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cmd[1] = 0x20;
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cmd[2] = sector>>16;
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cmd[3] = sector>>8;
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cmd[4] = sector;
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cmd[8] = cnt>>16;
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cmd[9] = cnt>>8;
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cmd[10] = cnt;
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return gdrom_check_sense( gdrom_do_read_command(cmd, buf, cnt<<11) );
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}
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int gdrom_mount_disk()
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{
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/* 76543210 76543210
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0 0x70 -
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2 0x1f -
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4 - -
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6 - -
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8 - -
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10 - - */
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unsigned char cmd[12];
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bzero(cmd, sizeof(cmd));
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cmd[0] = 0x70;
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cmd[1] = 0x1f;
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return gdrom_check_sense( gdrom_do_nodata_command(cmd) );
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}
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int
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gdrommatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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static int gdrom_matched = 0;
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struct shb_attach_args *sa = auxp;
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/* Allow only once instance. */
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if (strcmp("gdrom", cfp->cf_driver->cd_name) || gdrom_matched)
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return(0);
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gdrom_matched = 1;
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sa->ia_iosize = 0 /* 0x100 */;
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return(1);
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}
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void
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gdromattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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struct gdrom_softc *sc;
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sc = (struct gdrom_softc *)dp;
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BUFQ_INIT(&sc->bufq);
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printf("\n");
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/*
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* Initialize and attach the disk structure.
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*/
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sc->dkdev.dk_name = sc->sc_dv.dv_xname;
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sc->dkdev.dk_driver = &gdromdkdriver;
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disk_attach(&sc->dkdev);
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/*
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* reenable disabled drive
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*/
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{
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register u_int32_t p, x;
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*((volatile u_int32_t *)0xa05f74e4) = 0x1fffff;
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for(p=0; p<0x200000/4; p++)
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x = ((volatile u_int32_t *)0xa0000000)[p];
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}
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/* bootdev = MAKEBOOTDEV(19, 0, 0, 0, 0); */
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}
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int
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gdromopen(dev, flags, devtype, p)
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dev_t dev;
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int flags, devtype;
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struct proc *p;
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{
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struct gdrom_softc *sc;
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int track, part, error, unit, cnt;
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struct gd_toc toc;
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#ifdef GDROMDEBUG
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printf("GDROM: open\n");
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#endif
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unit = DISKUNIT(dev);
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if (unit >= gdrom_cd.cd_ndevs)
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return (ENXIO);
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sc = gdrom_cd.cd_devs[unit];
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if (sc == NULL)
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return (ENXIO);
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if (sc->is_open)
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return (EBUSY);
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for (cnt = 0; cnt < 5; cnt++)
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if ((error = gdrom_mount_disk()) == 0)
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break;
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if (error)
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return error;
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if ((error = gdrom_read_toc(&toc)) != 0)
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return error;
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part = DISKPART(dev);
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for (track = TOC_TRACK(toc.first); track <= TOC_TRACK(toc.last);
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track ++)
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if (TOC_CTRL(toc.entry[track-1]))
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if (!part)
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break;
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else
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--part;
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if (track > TOC_TRACK(toc.last) || track > 100)
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return (ENXIO);
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sc->is_open = 1;
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sc->openpart_start = htonl(TOC_LBA(toc.entry[track-1]));
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#ifdef GDROMDEBUG
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printf("open OK\n");
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#endif
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return (0);
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}
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int
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gdromclose(dev, flags, devtype, p)
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dev_t dev;
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int flags, devtype;
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struct proc *p;
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{
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struct gdrom_softc *sc;
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int unit;
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#ifdef GDROMDEBUG
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printf("GDROM: close\n");
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#endif
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unit = DISKUNIT(dev);
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sc = gdrom_cd.cd_devs[unit];
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sc->is_open = 0;
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return (0);
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}
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void
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gdromstrategy(bp)
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struct buf *bp;
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{
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struct gdrom_softc *sc;
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int unit, error;
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#ifdef GDROMDEBUG
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printf("GDROM: strategy\n");
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#endif
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unit = DISKUNIT(bp->b_dev);
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sc = gdrom_cd.cd_devs[unit];
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if (bp->b_bcount == 0)
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goto done;
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bp->b_rawblkno = bp->b_blkno / (2048 / DEV_BSIZE) + sc->openpart_start;
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#ifdef GDROMDEBUG
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printf("read_sectors(%p, %d, %ld) [%ld bytes]\n",
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bp->b_data, bp->b_rawblkno,
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bp->b_bcount>>11, bp->b_bcount);
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#endif
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if (error = gdrom_read_sectors(bp->b_data, bp->b_rawblkno,
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bp->b_bcount>>11)) {
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bp->b_error = error;
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bp->b_flags |= B_ERROR;
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}
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done:
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bp->b_resid = bp->b_bcount;
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biodone(bp);
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}
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int
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gdromioctl(dev, cmd, addr, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t addr;
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int flag;
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struct proc *p;
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||||
{
|
||||
#ifdef GDROMDEBUG
|
||||
printf("GDROM: ioctl %lx\n", cmd);
|
||||
#endif
|
||||
return (EINVAL);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Can't dump to CD; read only media...
|
||||
*/
|
||||
int
|
||||
gdromdump(dev, blkno, va, size)
|
||||
dev_t dev;
|
||||
daddr_t blkno;
|
||||
caddr_t va;
|
||||
size_t size;
|
||||
{
|
||||
return (EINVAL);
|
||||
}
|
||||
|
||||
int
|
||||
gdromsize(dev)
|
||||
dev_t dev;
|
||||
{
|
||||
return (-1);
|
||||
}
|
||||
|
||||
int
|
||||
gdromread(dev, uio, flags)
|
||||
dev_t dev;
|
||||
struct uio *uio;
|
||||
int flags;
|
||||
{
|
||||
#ifdef GDROMDEBUG
|
||||
printf("GDROM: read\n");
|
||||
#endif
|
||||
return (physio(gdromstrategy, NULL, dev, B_READ, minphys, uio));
|
||||
}
|
||||
|
||||
int
|
||||
gdromwrite(dev, uio, flags)
|
||||
dev_t dev;
|
||||
struct uio *uio;
|
||||
int flags;
|
||||
{
|
||||
return (EROFS);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user