Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/cdrom/mcdx.c b/drivers/cdrom/mcdx.c
new file mode 100644
index 0000000..ccde7ab
--- /dev/null
+++ b/drivers/cdrom/mcdx.c
@@ -0,0 +1,1952 @@
+/*
+ * The Mitsumi CDROM interface
+ * Copyright (C) 1995 1996 Heiko Schlittermann <heiko@lotte.sax.de>
+ * VERSION: 2.14(hs)
+ *
+ * ... anyway, I'm back again, thanks to Marcin, he adopted
+ * large portions of my code (at least the parts containing
+ * my main thoughts ...)
+ *
+ ****************** H E L P *********************************
+ * If you ever plan to update your CD ROM drive and perhaps
+ * want to sell or simply give away your Mitsumi FX-001[DS]
+ * -- Please --
+ * mail me (heiko@lotte.sax.de). When my last drive goes
+ * ballistic no more driver support will be available from me!
+ *************************************************************
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Thanks to
+ * The Linux Community at all and ...
+ * Martin Harriss (he wrote the first Mitsumi Driver)
+ * Eberhard Moenkeberg (he gave me much support and the initial kick)
+ * Bernd Huebner, Ruediger Helsch (Unifix-Software GmbH, they
+ * improved the original driver)
+ * Jon Tombs, Bjorn Ekwall (module support)
+ * Daniel v. Mosnenck (he sent me the Technical and Programming Reference)
+ * Gerd Knorr (he lent me his PhotoCD)
+ * Nils Faerber and Roger E. Wolff (extensively tested the LU portion)
+ * Andreas Kies (testing the mysterious hang-ups)
+ * Heiko Eissfeldt (VERIFY_READ/WRITE)
+ * Marcin Dalecki (improved performance, shortened code)
+ * ... somebody forgotten?
+ *
+ * 9 November 1999 -- Make kernel-parameter implementation work with 2.3.x
+ * Removed init_module & cleanup_module in favor of
+ * module_init & module_exit.
+ * Torben Mathiasen <tmm@image.dk>
+ */
+
+
+#if RCS
+static const char *mcdx_c_version
+ = "$Id: mcdx.c,v 1.21 1997/01/26 07:12:59 davem Exp $";
+#endif
+
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/cdrom.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+#include <linux/major.h>
+#define MAJOR_NR MITSUMI_X_CDROM_MAJOR
+#include <linux/blkdev.h>
+#include <linux/devfs_fs_kernel.h>
+
+#include "mcdx.h"
+
+#ifndef HZ
+#error HZ not defined
+#endif
+
+#define xwarn(fmt, args...) printk(KERN_WARNING MCDX " " fmt, ## args)
+
+#if !MCDX_QUIET
+#define xinfo(fmt, args...) printk(KERN_INFO MCDX " " fmt, ## args)
+#else
+#define xinfo(fmt, args...) { ; }
+#endif
+
+#if MCDX_DEBUG
+#define xtrace(lvl, fmt, args...) \
+ { if (lvl > 0) \
+ { printk(KERN_DEBUG MCDX ":: " fmt, ## args); } }
+#define xdebug(fmt, args...) printk(KERN_DEBUG MCDX ":: " fmt, ## args)
+#else
+#define xtrace(lvl, fmt, args...) { ; }
+#define xdebug(fmt, args...) { ; }
+#endif
+
+/* CONSTANTS *******************************************************/
+
+/* Following are the number of sectors we _request_ from the drive
+ every time an access outside the already requested range is done.
+ The _direct_ size is the number of sectors we're allowed to skip
+ directly (performing a read instead of requesting the new sector
+ needed */
+const int REQUEST_SIZE = 800; /* should be less then 255 * 4 */
+const int DIRECT_SIZE = 400; /* should be less then REQUEST_SIZE */
+
+enum drivemodes { TOC, DATA, RAW, COOKED };
+enum datamodes { MODE0, MODE1, MODE2 };
+enum resetmodes { SOFT, HARD };
+
+const int SINGLE = 0x01; /* single speed drive (FX001S, LU) */
+const int DOUBLE = 0x02; /* double speed drive (FX001D, ..? */
+const int DOOR = 0x04; /* door locking capability */
+const int MULTI = 0x08; /* multi session capability */
+
+const unsigned char READ1X = 0xc0;
+const unsigned char READ2X = 0xc1;
+
+
+/* DECLARATIONS ****************************************************/
+struct s_subqcode {
+ unsigned char control;
+ unsigned char tno;
+ unsigned char index;
+ struct cdrom_msf0 tt;
+ struct cdrom_msf0 dt;
+};
+
+struct s_diskinfo {
+ unsigned int n_first;
+ unsigned int n_last;
+ struct cdrom_msf0 msf_leadout;
+ struct cdrom_msf0 msf_first;
+};
+
+struct s_multi {
+ unsigned char multi;
+ struct cdrom_msf0 msf_last;
+};
+
+struct s_version {
+ unsigned char code;
+ unsigned char ver;
+};
+
+/* Per drive/controller stuff **************************************/
+
+struct s_drive_stuff {
+ /* waitqueues */
+ wait_queue_head_t busyq;
+ wait_queue_head_t lockq;
+ wait_queue_head_t sleepq;
+
+ /* flags */
+ volatile int introk; /* status of last irq operation */
+ volatile int busy; /* drive performs an operation */
+ volatile int lock; /* exclusive usage */
+
+ /* cd infos */
+ struct s_diskinfo di;
+ struct s_multi multi;
+ struct s_subqcode *toc; /* first entry of the toc array */
+ struct s_subqcode start;
+ struct s_subqcode stop;
+ int xa; /* 1 if xa disk */
+ int audio; /* 1 if audio disk */
+ int audiostatus;
+
+ /* `buffer' control */
+ volatile int valid; /* pending, ..., values are valid */
+ volatile int pending; /* next sector to be read */
+ volatile int low_border; /* first sector not to be skipped direct */
+ volatile int high_border; /* first sector `out of area' */
+#ifdef AK2
+ volatile int int_err;
+#endif /* AK2 */
+
+ /* adds and odds */
+ unsigned wreg_data; /* w data */
+ unsigned wreg_reset; /* w hardware reset */
+ unsigned wreg_hcon; /* w hardware conf */
+ unsigned wreg_chn; /* w channel */
+ unsigned rreg_data; /* r data */
+ unsigned rreg_status; /* r status */
+
+ int irq; /* irq used by this drive */
+ int present; /* drive present and its capabilities */
+ unsigned char readcmd; /* read cmd depends on single/double speed */
+ unsigned char playcmd; /* play should always be single speed */
+ unsigned int xxx; /* set if changed, reset while open */
+ unsigned int yyy; /* set if changed, reset by media_changed */
+ int users; /* keeps track of open/close */
+ int lastsector; /* last block accessible */
+ int status; /* last operation's error / status */
+ int readerrs; /* # of blocks read w/o error */
+ struct cdrom_device_info info;
+ struct gendisk *disk;
+};
+
+
+/* Prototypes ******************************************************/
+
+/* The following prototypes are already declared elsewhere. They are
+ repeated here to show what's going on. And to sense, if they're
+ changed elsewhere. */
+
+/* declared in blk.h */
+int mcdx_init(void);
+void do_mcdx_request(request_queue_t * q);
+
+static int mcdx_block_open(struct inode *inode, struct file *file)
+{
+ struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
+ return cdrom_open(&p->info, inode, file);
+}
+
+static int mcdx_block_release(struct inode *inode, struct file *file)
+{
+ struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
+ return cdrom_release(&p->info, file);
+}
+
+static int mcdx_block_ioctl(struct inode *inode, struct file *file,
+ unsigned cmd, unsigned long arg)
+{
+ struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
+ return cdrom_ioctl(file, &p->info, inode, cmd, arg);
+}
+
+static int mcdx_block_media_changed(struct gendisk *disk)
+{
+ struct s_drive_stuff *p = disk->private_data;
+ return cdrom_media_changed(&p->info);
+}
+
+static struct block_device_operations mcdx_bdops =
+{
+ .owner = THIS_MODULE,
+ .open = mcdx_block_open,
+ .release = mcdx_block_release,
+ .ioctl = mcdx_block_ioctl,
+ .media_changed = mcdx_block_media_changed,
+};
+
+
+/* Indirect exported functions. These functions are exported by their
+ addresses, such as mcdx_open and mcdx_close in the
+ structure mcdx_dops. */
+
+/* exported by file_ops */
+static int mcdx_open(struct cdrom_device_info *cdi, int purpose);
+static void mcdx_close(struct cdrom_device_info *cdi);
+static int mcdx_media_changed(struct cdrom_device_info *cdi, int disc_nr);
+static int mcdx_tray_move(struct cdrom_device_info *cdi, int position);
+static int mcdx_lockdoor(struct cdrom_device_info *cdi, int lock);
+static int mcdx_audio_ioctl(struct cdrom_device_info *cdi,
+ unsigned int cmd, void *arg);
+
+/* misc internal support functions */
+static void log2msf(unsigned int, struct cdrom_msf0 *);
+static unsigned int msf2log(const struct cdrom_msf0 *);
+static unsigned int uint2bcd(unsigned int);
+static unsigned int bcd2uint(unsigned char);
+static unsigned port(int *);
+static int irq(int *);
+static void mcdx_delay(struct s_drive_stuff *, long jifs);
+static int mcdx_transfer(struct s_drive_stuff *, char *buf, int sector,
+ int nr_sectors);
+static int mcdx_xfer(struct s_drive_stuff *, char *buf, int sector,
+ int nr_sectors);
+
+static int mcdx_config(struct s_drive_stuff *, int);
+static int mcdx_requestversion(struct s_drive_stuff *, struct s_version *,
+ int);
+static int mcdx_stop(struct s_drive_stuff *, int);
+static int mcdx_hold(struct s_drive_stuff *, int);
+static int mcdx_reset(struct s_drive_stuff *, enum resetmodes, int);
+static int mcdx_setdrivemode(struct s_drive_stuff *, enum drivemodes, int);
+static int mcdx_setdatamode(struct s_drive_stuff *, enum datamodes, int);
+static int mcdx_requestsubqcode(struct s_drive_stuff *,
+ struct s_subqcode *, int);
+static int mcdx_requestmultidiskinfo(struct s_drive_stuff *,
+ struct s_multi *, int);
+static int mcdx_requesttocdata(struct s_drive_stuff *, struct s_diskinfo *,
+ int);
+static int mcdx_getstatus(struct s_drive_stuff *, int);
+static int mcdx_getval(struct s_drive_stuff *, int to, int delay, char *);
+static int mcdx_talk(struct s_drive_stuff *,
+ const unsigned char *cmd, size_t,
+ void *buffer, size_t size, unsigned int timeout, int);
+static int mcdx_readtoc(struct s_drive_stuff *);
+static int mcdx_playtrk(struct s_drive_stuff *, const struct cdrom_ti *);
+static int mcdx_playmsf(struct s_drive_stuff *, const struct cdrom_msf *);
+static int mcdx_setattentuator(struct s_drive_stuff *,
+ struct cdrom_volctrl *, int);
+
+/* static variables ************************************************/
+
+static int mcdx_drive_map[][2] = MCDX_DRIVEMAP;
+static struct s_drive_stuff *mcdx_stuffp[MCDX_NDRIVES];
+static DEFINE_SPINLOCK(mcdx_lock);
+static struct request_queue *mcdx_queue;
+
+/* You can only set the first two pairs, from old MODULE_PARM code. */
+static int mcdx_set(const char *val, struct kernel_param *kp)
+{
+ get_options((char *)val, 4, (int *)mcdx_drive_map);
+ return 0;
+}
+module_param_call(mcdx, mcdx_set, NULL, NULL, 0);
+
+static struct cdrom_device_ops mcdx_dops = {
+ .open = mcdx_open,
+ .release = mcdx_close,
+ .media_changed = mcdx_media_changed,
+ .tray_move = mcdx_tray_move,
+ .lock_door = mcdx_lockdoor,
+ .audio_ioctl = mcdx_audio_ioctl,
+ .capability = CDC_OPEN_TRAY | CDC_LOCK | CDC_MEDIA_CHANGED |
+ CDC_PLAY_AUDIO | CDC_DRIVE_STATUS,
+};
+
+/* KERNEL INTERFACE FUNCTIONS **************************************/
+
+
+static int mcdx_audio_ioctl(struct cdrom_device_info *cdi,
+ unsigned int cmd, void *arg)
+{
+ struct s_drive_stuff *stuffp = cdi->handle;
+
+ if (!stuffp->present)
+ return -ENXIO;
+
+ if (stuffp->xxx) {
+ if (-1 == mcdx_requesttocdata(stuffp, &stuffp->di, 1)) {
+ stuffp->lastsector = -1;
+ } else {
+ stuffp->lastsector = (CD_FRAMESIZE / 512)
+ * msf2log(&stuffp->di.msf_leadout) - 1;
+ }
+
+ if (stuffp->toc) {
+ kfree(stuffp->toc);
+ stuffp->toc = NULL;
+ if (-1 == mcdx_readtoc(stuffp))
+ return -1;
+ }
+
+ stuffp->xxx = 0;
+ }
+
+ switch (cmd) {
+ case CDROMSTART:{
+ xtrace(IOCTL, "ioctl() START\n");
+ /* Spin up the drive. Don't think we can do this.
+ * For now, ignore it.
+ */
+ return 0;
+ }
+
+ case CDROMSTOP:{
+ xtrace(IOCTL, "ioctl() STOP\n");
+ stuffp->audiostatus = CDROM_AUDIO_INVALID;
+ if (-1 == mcdx_stop(stuffp, 1))
+ return -EIO;
+ return 0;
+ }
+
+ case CDROMPLAYTRKIND:{
+ struct cdrom_ti *ti = (struct cdrom_ti *) arg;
+
+ xtrace(IOCTL, "ioctl() PLAYTRKIND\n");
+ if ((ti->cdti_trk0 < stuffp->di.n_first)
+ || (ti->cdti_trk0 > stuffp->di.n_last)
+ || (ti->cdti_trk1 < stuffp->di.n_first))
+ return -EINVAL;
+ if (ti->cdti_trk1 > stuffp->di.n_last)
+ ti->cdti_trk1 = stuffp->di.n_last;
+ xtrace(PLAYTRK, "ioctl() track %d to %d\n",
+ ti->cdti_trk0, ti->cdti_trk1);
+ return mcdx_playtrk(stuffp, ti);
+ }
+
+ case CDROMPLAYMSF:{
+ struct cdrom_msf *msf = (struct cdrom_msf *) arg;
+
+ xtrace(IOCTL, "ioctl() PLAYMSF\n");
+
+ if ((stuffp->audiostatus == CDROM_AUDIO_PLAY)
+ && (-1 == mcdx_hold(stuffp, 1)))
+ return -EIO;
+
+ msf->cdmsf_min0 = uint2bcd(msf->cdmsf_min0);
+ msf->cdmsf_sec0 = uint2bcd(msf->cdmsf_sec0);
+ msf->cdmsf_frame0 = uint2bcd(msf->cdmsf_frame0);
+
+ msf->cdmsf_min1 = uint2bcd(msf->cdmsf_min1);
+ msf->cdmsf_sec1 = uint2bcd(msf->cdmsf_sec1);
+ msf->cdmsf_frame1 = uint2bcd(msf->cdmsf_frame1);
+
+ stuffp->stop.dt.minute = msf->cdmsf_min1;
+ stuffp->stop.dt.second = msf->cdmsf_sec1;
+ stuffp->stop.dt.frame = msf->cdmsf_frame1;
+
+ return mcdx_playmsf(stuffp, msf);
+ }
+
+ case CDROMRESUME:{
+ xtrace(IOCTL, "ioctl() RESUME\n");
+ return mcdx_playtrk(stuffp, NULL);
+ }
+
+ case CDROMREADTOCENTRY:{
+ struct cdrom_tocentry *entry =
+ (struct cdrom_tocentry *) arg;
+ struct s_subqcode *tp = NULL;
+ xtrace(IOCTL, "ioctl() READTOCENTRY\n");
+
+ if (-1 == mcdx_readtoc(stuffp))
+ return -1;
+ if (entry->cdte_track == CDROM_LEADOUT)
+ tp = &stuffp->toc[stuffp->di.n_last -
+ stuffp->di.n_first + 1];
+ else if (entry->cdte_track > stuffp->di.n_last
+ || entry->cdte_track < stuffp->di.n_first)
+ return -EINVAL;
+ else
+ tp = &stuffp->toc[entry->cdte_track -
+ stuffp->di.n_first];
+
+ if (NULL == tp)
+ return -EIO;
+ entry->cdte_adr = tp->control;
+ entry->cdte_ctrl = tp->control >> 4;
+ /* Always return stuff in MSF, and let the Uniform cdrom driver
+ worry about what the user actually wants */
+ entry->cdte_addr.msf.minute =
+ bcd2uint(tp->dt.minute);
+ entry->cdte_addr.msf.second =
+ bcd2uint(tp->dt.second);
+ entry->cdte_addr.msf.frame =
+ bcd2uint(tp->dt.frame);
+ return 0;
+ }
+
+ case CDROMSUBCHNL:{
+ struct cdrom_subchnl *sub =
+ (struct cdrom_subchnl *) arg;
+ struct s_subqcode q;
+
+ xtrace(IOCTL, "ioctl() SUBCHNL\n");
+
+ if (-1 == mcdx_requestsubqcode(stuffp, &q, 2))
+ return -EIO;
+
+ xtrace(SUBCHNL, "audiostatus: %x\n",
+ stuffp->audiostatus);
+ sub->cdsc_audiostatus = stuffp->audiostatus;
+ sub->cdsc_adr = q.control;
+ sub->cdsc_ctrl = q.control >> 4;
+ sub->cdsc_trk = bcd2uint(q.tno);
+ sub->cdsc_ind = bcd2uint(q.index);
+
+ xtrace(SUBCHNL, "trk %d, ind %d\n",
+ sub->cdsc_trk, sub->cdsc_ind);
+ /* Always return stuff in MSF, and let the Uniform cdrom driver
+ worry about what the user actually wants */
+ sub->cdsc_absaddr.msf.minute =
+ bcd2uint(q.dt.minute);
+ sub->cdsc_absaddr.msf.second =
+ bcd2uint(q.dt.second);
+ sub->cdsc_absaddr.msf.frame = bcd2uint(q.dt.frame);
+ sub->cdsc_reladdr.msf.minute =
+ bcd2uint(q.tt.minute);
+ sub->cdsc_reladdr.msf.second =
+ bcd2uint(q.tt.second);
+ sub->cdsc_reladdr.msf.frame = bcd2uint(q.tt.frame);
+ xtrace(SUBCHNL,
+ "msf: abs %02d:%02d:%02d, rel %02d:%02d:%02d\n",
+ sub->cdsc_absaddr.msf.minute,
+ sub->cdsc_absaddr.msf.second,
+ sub->cdsc_absaddr.msf.frame,
+ sub->cdsc_reladdr.msf.minute,
+ sub->cdsc_reladdr.msf.second,
+ sub->cdsc_reladdr.msf.frame);
+
+ return 0;
+ }
+
+ case CDROMREADTOCHDR:{
+ struct cdrom_tochdr *toc =
+ (struct cdrom_tochdr *) arg;
+
+ xtrace(IOCTL, "ioctl() READTOCHDR\n");
+ toc->cdth_trk0 = stuffp->di.n_first;
+ toc->cdth_trk1 = stuffp->di.n_last;
+ xtrace(TOCHDR,
+ "ioctl() track0 = %d, track1 = %d\n",
+ stuffp->di.n_first, stuffp->di.n_last);
+ return 0;
+ }
+
+ case CDROMPAUSE:{
+ xtrace(IOCTL, "ioctl() PAUSE\n");
+ if (stuffp->audiostatus != CDROM_AUDIO_PLAY)
+ return -EINVAL;
+ if (-1 == mcdx_stop(stuffp, 1))
+ return -EIO;
+ stuffp->audiostatus = CDROM_AUDIO_PAUSED;
+ if (-1 ==
+ mcdx_requestsubqcode(stuffp, &stuffp->start,
+ 1))
+ return -EIO;
+ return 0;
+ }
+
+ case CDROMMULTISESSION:{
+ struct cdrom_multisession *ms =
+ (struct cdrom_multisession *) arg;
+ xtrace(IOCTL, "ioctl() MULTISESSION\n");
+ /* Always return stuff in LBA, and let the Uniform cdrom driver
+ worry about what the user actually wants */
+ ms->addr.lba = msf2log(&stuffp->multi.msf_last);
+ ms->xa_flag = !!stuffp->multi.multi;
+ xtrace(MS,
+ "ioctl() (%d, 0x%08x [%02x:%02x.%02x])\n",
+ ms->xa_flag, ms->addr.lba,
+ stuffp->multi.msf_last.minute,
+ stuffp->multi.msf_last.second,
+ stuffp->multi.msf_last.frame);
+
+ return 0;
+ }
+
+ case CDROMEJECT:{
+ xtrace(IOCTL, "ioctl() EJECT\n");
+ if (stuffp->users > 1)
+ return -EBUSY;
+ return (mcdx_tray_move(cdi, 1));
+ }
+
+ case CDROMCLOSETRAY:{
+ xtrace(IOCTL, "ioctl() CDROMCLOSETRAY\n");
+ return (mcdx_tray_move(cdi, 0));
+ }
+
+ case CDROMVOLCTRL:{
+ struct cdrom_volctrl *volctrl =
+ (struct cdrom_volctrl *) arg;
+ xtrace(IOCTL, "ioctl() VOLCTRL\n");
+
+#if 0 /* not tested! */
+ /* adjust for the weirdness of workman (md) */
+ /* can't test it (hs) */
+ volctrl.channel2 = volctrl.channel1;
+ volctrl.channel1 = volctrl.channel3 = 0x00;
+#endif
+ return mcdx_setattentuator(stuffp, volctrl, 2);
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+void do_mcdx_request(request_queue_t * q)
+{
+ struct s_drive_stuff *stuffp;
+ struct request *req;
+
+ again:
+
+ req = elv_next_request(q);
+ if (!req)
+ return;
+
+ stuffp = req->rq_disk->private_data;
+
+ if (!stuffp->present) {
+ xwarn("do_request(): bad device: %s\n",req->rq_disk->disk_name);
+ xtrace(REQUEST, "end_request(0): bad device\n");
+ end_request(req, 0);
+ return;
+ }
+
+ if (stuffp->audio) {
+ xwarn("do_request() attempt to read from audio cd\n");
+ xtrace(REQUEST, "end_request(0): read from audio\n");
+ end_request(req, 0);
+ return;
+ }
+
+ xtrace(REQUEST, "do_request() (%lu + %lu)\n",
+ req->sector, req->nr_sectors);
+
+ if (req->cmd != READ) {
+ xwarn("do_request(): non-read command to cd!!\n");
+ xtrace(REQUEST, "end_request(0): write\n");
+ end_request(req, 0);
+ return;
+ }
+ else {
+ stuffp->status = 0;
+ while (req->nr_sectors) {
+ int i;
+
+ i = mcdx_transfer(stuffp,
+ req->buffer,
+ req->sector,
+ req->nr_sectors);
+
+ if (i == -1) {
+ end_request(req, 0);
+ goto again;
+ }
+ req->sector += i;
+ req->nr_sectors -= i;
+ req->buffer += (i * 512);
+ }
+ end_request(req, 1);
+ goto again;
+
+ xtrace(REQUEST, "end_request(1)\n");
+ end_request(req, 1);
+ }
+
+ goto again;
+}
+
+static int mcdx_open(struct cdrom_device_info *cdi, int purpose)
+{
+ struct s_drive_stuff *stuffp;
+ xtrace(OPENCLOSE, "open()\n");
+ stuffp = cdi->handle;
+ if (!stuffp->present)
+ return -ENXIO;
+
+ /* Make the modules looking used ... (thanx bjorn).
+ * But we shouldn't forget to decrement the module counter
+ * on error return */
+
+ /* this is only done to test if the drive talks with us */
+ if (-1 == mcdx_getstatus(stuffp, 1))
+ return -EIO;
+
+ if (stuffp->xxx) {
+
+ xtrace(OPENCLOSE, "open() media changed\n");
+ stuffp->audiostatus = CDROM_AUDIO_INVALID;
+ stuffp->readcmd = 0;
+ xtrace(OPENCLOSE, "open() Request multisession info\n");
+ if (-1 ==
+ mcdx_requestmultidiskinfo(stuffp, &stuffp->multi, 6))
+ xinfo("No multidiskinfo\n");
+ } else {
+ /* multisession ? */
+ if (!stuffp->multi.multi)
+ stuffp->multi.msf_last.second = 2;
+
+ xtrace(OPENCLOSE, "open() MS: %d, last @ %02x:%02x.%02x\n",
+ stuffp->multi.multi,
+ stuffp->multi.msf_last.minute,
+ stuffp->multi.msf_last.second,
+ stuffp->multi.msf_last.frame);
+
+ {;
+ } /* got multisession information */
+ /* request the disks table of contents (aka diskinfo) */
+ if (-1 == mcdx_requesttocdata(stuffp, &stuffp->di, 1)) {
+
+ stuffp->lastsector = -1;
+
+ } else {
+
+ stuffp->lastsector = (CD_FRAMESIZE / 512)
+ * msf2log(&stuffp->di.msf_leadout) - 1;
+
+ xtrace(OPENCLOSE,
+ "open() start %d (%02x:%02x.%02x) %d\n",
+ stuffp->di.n_first,
+ stuffp->di.msf_first.minute,
+ stuffp->di.msf_first.second,
+ stuffp->di.msf_first.frame,
+ msf2log(&stuffp->di.msf_first));
+ xtrace(OPENCLOSE,
+ "open() last %d (%02x:%02x.%02x) %d\n",
+ stuffp->di.n_last,
+ stuffp->di.msf_leadout.minute,
+ stuffp->di.msf_leadout.second,
+ stuffp->di.msf_leadout.frame,
+ msf2log(&stuffp->di.msf_leadout));
+ }
+
+ if (stuffp->toc) {
+ xtrace(MALLOC, "open() free old toc @ %p\n",
+ stuffp->toc);
+ kfree(stuffp->toc);
+
+ stuffp->toc = NULL;
+ }
+
+ xtrace(OPENCLOSE, "open() init irq generation\n");
+ if (-1 == mcdx_config(stuffp, 1))
+ return -EIO;
+#if FALLBACK
+ /* Set the read speed */
+ xwarn("AAA %x AAA\n", stuffp->readcmd);
+ if (stuffp->readerrs)
+ stuffp->readcmd = READ1X;
+ else
+ stuffp->readcmd =
+ stuffp->present | SINGLE ? READ1X : READ2X;
+ xwarn("XXX %x XXX\n", stuffp->readcmd);
+#else
+ stuffp->readcmd =
+ stuffp->present | SINGLE ? READ1X : READ2X;
+#endif
+
+ /* try to get the first sector, iff any ... */
+ if (stuffp->lastsector >= 0) {
+ char buf[512];
+ int ans;
+ int tries;
+
+ stuffp->xa = 0;
+ stuffp->audio = 0;
+
+ for (tries = 6; tries; tries--) {
+
+ stuffp->introk = 1;
+
+ xtrace(OPENCLOSE, "open() try as %s\n",
+ stuffp->xa ? "XA" : "normal");
+ /* set data mode */
+ if (-1 == (ans = mcdx_setdatamode(stuffp,
+ stuffp->
+ xa ?
+ MODE2 :
+ MODE1,
+ 1))) {
+ /* return -EIO; */
+ stuffp->xa = 0;
+ break;
+ }
+
+ if ((stuffp->audio = e_audio(ans)))
+ break;
+
+ while (0 ==
+ (ans =
+ mcdx_transfer(stuffp, buf, 0, 1)));
+
+ if (ans == 1)
+ break;
+ stuffp->xa = !stuffp->xa;
+ }
+ }
+ /* xa disks will be read in raw mode, others not */
+ if (-1 == mcdx_setdrivemode(stuffp,
+ stuffp->xa ? RAW : COOKED,
+ 1))
+ return -EIO;
+ if (stuffp->audio) {
+ xinfo("open() audio disk found\n");
+ } else if (stuffp->lastsector >= 0) {
+ xinfo("open() %s%s disk found\n",
+ stuffp->xa ? "XA / " : "",
+ stuffp->multi.
+ multi ? "Multi Session" : "Single Session");
+ }
+ }
+ stuffp->xxx = 0;
+ stuffp->users++;
+ return 0;
+}
+
+static void mcdx_close(struct cdrom_device_info *cdi)
+{
+ struct s_drive_stuff *stuffp;
+
+ xtrace(OPENCLOSE, "close()\n");
+
+ stuffp = cdi->handle;
+
+ --stuffp->users;
+}
+
+static int mcdx_media_changed(struct cdrom_device_info *cdi, int disc_nr)
+/* Return: 1 if media changed since last call to this function
+ 0 otherwise */
+{
+ struct s_drive_stuff *stuffp;
+
+ xinfo("mcdx_media_changed called for device %s\n", cdi->name);
+
+ stuffp = cdi->handle;
+ mcdx_getstatus(stuffp, 1);
+
+ if (stuffp->yyy == 0)
+ return 0;
+
+ stuffp->yyy = 0;
+ return 1;
+}
+
+#ifndef MODULE
+static int __init mcdx_setup(char *str)
+{
+ int pi[4];
+ (void) get_options(str, ARRAY_SIZE(pi), pi);
+
+ if (pi[0] > 0)
+ mcdx_drive_map[0][0] = pi[1];
+ if (pi[0] > 1)
+ mcdx_drive_map[0][1] = pi[2];
+ return 1;
+}
+
+__setup("mcdx=", mcdx_setup);
+
+#endif
+
+/* DIRTY PART ******************************************************/
+
+static void mcdx_delay(struct s_drive_stuff *stuff, long jifs)
+/* This routine is used for sleeping.
+ * A jifs value <0 means NO sleeping,
+ * =0 means minimal sleeping (let the kernel
+ * run for other processes)
+ * >0 means at least sleep for that amount.
+ * May be we could use a simple count loop w/ jumps to itself, but
+ * I wanna make this independent of cpu speed. [1 jiffy is 1/HZ] sec */
+{
+ if (jifs < 0)
+ return;
+
+ xtrace(SLEEP, "*** delay: sleepq\n");
+ interruptible_sleep_on_timeout(&stuff->sleepq, jifs);
+ xtrace(SLEEP, "delay awoken\n");
+ if (signal_pending(current)) {
+ xtrace(SLEEP, "got signal\n");
+ }
+}
+
+static irqreturn_t mcdx_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct s_drive_stuff *stuffp = dev_id;
+ unsigned char b;
+
+ if (stuffp == NULL) {
+ xwarn("mcdx: no device for intr %d\n", irq);
+ return IRQ_NONE;
+ }
+#ifdef AK2
+ if (!stuffp->busy && stuffp->pending)
+ stuffp->int_err = 1;
+
+#endif /* AK2 */
+ /* get the interrupt status */
+ b = inb(stuffp->rreg_status);
+ stuffp->introk = ~b & MCDX_RBIT_DTEN;
+
+ /* NOTE: We only should get interrupts if the data we
+ * requested are ready to transfer.
+ * But the drive seems to generate ``asynchronous'' interrupts
+ * on several error conditions too. (Despite the err int enable
+ * setting during initialisation) */
+
+ /* if not ok, read the next byte as the drives status */
+ if (!stuffp->introk) {
+ xtrace(IRQ, "intr() irq %d hw status 0x%02x\n", irq, b);
+ if (~b & MCDX_RBIT_STEN) {
+ xinfo("intr() irq %d status 0x%02x\n",
+ irq, inb(stuffp->rreg_data));
+ } else {
+ xinfo("intr() irq %d ambiguous hw status\n", irq);
+ }
+ } else {
+ xtrace(IRQ, "irq() irq %d ok, status %02x\n", irq, b);
+ }
+
+ stuffp->busy = 0;
+ wake_up_interruptible(&stuffp->busyq);
+ return IRQ_HANDLED;
+}
+
+
+static int mcdx_talk(struct s_drive_stuff *stuffp,
+ const unsigned char *cmd, size_t cmdlen,
+ void *buffer, size_t size, unsigned int timeout, int tries)
+/* Send a command to the drive, wait for the result.
+ * returns -1 on timeout, drive status otherwise
+ * If buffer is not zero, the result (length size) is stored there.
+ * If buffer is zero the size should be the number of bytes to read
+ * from the drive. These bytes are discarded.
+ */
+{
+ int st;
+ char c;
+ int discard;
+
+ /* Somebody wants the data read? */
+ if ((discard = (buffer == NULL)))
+ buffer = &c;
+
+ while (stuffp->lock) {
+ xtrace(SLEEP, "*** talk: lockq\n");
+ interruptible_sleep_on(&stuffp->lockq);
+ xtrace(SLEEP, "talk: awoken\n");
+ }
+
+ stuffp->lock = 1;
+
+ /* An operation other then reading data destroys the
+ * data already requested and remembered in stuffp->request, ... */
+ stuffp->valid = 0;
+
+#if MCDX_DEBUG & TALK
+ {
+ unsigned char i;
+ xtrace(TALK,
+ "talk() %d / %d tries, res.size %d, command 0x%02x",
+ tries, timeout, size, (unsigned char) cmd[0]);
+ for (i = 1; i < cmdlen; i++)
+ xtrace(TALK, " 0x%02x", cmd[i]);
+ xtrace(TALK, "\n");
+ }
+#endif
+
+ /* give up if all tries are done (bad) or if the status
+ * st != -1 (good) */
+ for (st = -1; st == -1 && tries; tries--) {
+
+ char *bp = (char *) buffer;
+ size_t sz = size;
+
+ outsb(stuffp->wreg_data, cmd, cmdlen);
+ xtrace(TALK, "talk() command sent\n");
+
+ /* get the status byte */
+ if (-1 == mcdx_getval(stuffp, timeout, 0, bp)) {
+ xinfo("talk() %02x timed out (status), %d tr%s left\n",
+ cmd[0], tries - 1, tries == 2 ? "y" : "ies");
+ continue;
+ }
+ st = *bp;
+ sz--;
+ if (!discard)
+ bp++;
+
+ xtrace(TALK, "talk() got status 0x%02x\n", st);
+
+ /* command error? */
+ if (e_cmderr(st)) {
+ xwarn("command error cmd = %02x %s \n",
+ cmd[0], cmdlen > 1 ? "..." : "");
+ st = -1;
+ continue;
+ }
+
+ /* audio status? */
+ if (stuffp->audiostatus == CDROM_AUDIO_INVALID)
+ stuffp->audiostatus =
+ e_audiobusy(st) ? CDROM_AUDIO_PLAY :
+ CDROM_AUDIO_NO_STATUS;
+ else if (stuffp->audiostatus == CDROM_AUDIO_PLAY
+ && e_audiobusy(st) == 0)
+ stuffp->audiostatus = CDROM_AUDIO_COMPLETED;
+
+ /* media change? */
+ if (e_changed(st)) {
+ xinfo("talk() media changed\n");
+ stuffp->xxx = stuffp->yyy = 1;
+ }
+
+ /* now actually get the data */
+ while (sz--) {
+ if (-1 == mcdx_getval(stuffp, timeout, 0, bp)) {
+ xinfo("talk() %02x timed out (data), %d tr%s left\n",
+ cmd[0], tries - 1,
+ tries == 2 ? "y" : "ies");
+ st = -1;
+ break;
+ }
+ if (!discard)
+ bp++;
+ xtrace(TALK, "talk() got 0x%02x\n", *(bp - 1));
+ }
+ }
+
+#if !MCDX_QUIET
+ if (!tries && st == -1)
+ xinfo("talk() giving up\n");
+#endif
+
+ stuffp->lock = 0;
+ wake_up_interruptible(&stuffp->lockq);
+
+ xtrace(TALK, "talk() done with 0x%02x\n", st);
+ return st;
+}
+
+/* MODULE STUFF ***********************************************************/
+
+int __mcdx_init(void)
+{
+ int i;
+ int drives = 0;
+
+ mcdx_init();
+ for (i = 0; i < MCDX_NDRIVES; i++) {
+ if (mcdx_stuffp[i]) {
+ xtrace(INIT, "init_module() drive %d stuff @ %p\n",
+ i, mcdx_stuffp[i]);
+ drives++;
+ }
+ }
+
+ if (!drives)
+ return -EIO;
+
+ return 0;
+}
+
+void __exit mcdx_exit(void)
+{
+ int i;
+
+ xinfo("cleanup_module called\n");
+
+ for (i = 0; i < MCDX_NDRIVES; i++) {
+ struct s_drive_stuff *stuffp = mcdx_stuffp[i];
+ if (!stuffp)
+ continue;
+ del_gendisk(stuffp->disk);
+ if (unregister_cdrom(&stuffp->info)) {
+ printk(KERN_WARNING "Can't unregister cdrom mcdx\n");
+ continue;
+ }
+ put_disk(stuffp->disk);
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ free_irq(stuffp->irq, NULL);
+ if (stuffp->toc) {
+ xtrace(MALLOC, "cleanup_module() free toc @ %p\n",
+ stuffp->toc);
+ kfree(stuffp->toc);
+ }
+ xtrace(MALLOC, "cleanup_module() free stuffp @ %p\n",
+ stuffp);
+ mcdx_stuffp[i] = NULL;
+ kfree(stuffp);
+ }
+
+ if (unregister_blkdev(MAJOR_NR, "mcdx") != 0) {
+ xwarn("cleanup() unregister_blkdev() failed\n");
+ }
+ blk_cleanup_queue(mcdx_queue);
+#if !MCDX_QUIET
+ else
+ xinfo("cleanup() succeeded\n");
+#endif
+}
+
+#ifdef MODULE
+module_init(__mcdx_init);
+#endif
+module_exit(mcdx_exit);
+
+
+/* Support functions ************************************************/
+
+int __init mcdx_init_drive(int drive)
+{
+ struct s_version version;
+ struct gendisk *disk;
+ struct s_drive_stuff *stuffp;
+ int size = sizeof(*stuffp);
+ char msg[80];
+
+ xtrace(INIT, "init() try drive %d\n", drive);
+
+ xtrace(INIT, "kmalloc space for stuffpt's\n");
+ xtrace(MALLOC, "init() malloc %d bytes\n", size);
+ if (!(stuffp = kmalloc(size, GFP_KERNEL))) {
+ xwarn("init() malloc failed\n");
+ return 1;
+ }
+
+ disk = alloc_disk(1);
+ if (!disk) {
+ xwarn("init() malloc failed\n");
+ kfree(stuffp);
+ return 1;
+ }
+
+ xtrace(INIT, "init() got %d bytes for drive stuff @ %p\n",
+ sizeof(*stuffp), stuffp);
+
+ /* set default values */
+ memset(stuffp, 0, sizeof(*stuffp));
+
+ stuffp->present = 0; /* this should be 0 already */
+ stuffp->toc = NULL; /* this should be NULL already */
+
+ /* setup our irq and i/o addresses */
+ stuffp->irq = irq(mcdx_drive_map[drive]);
+ stuffp->wreg_data = stuffp->rreg_data = port(mcdx_drive_map[drive]);
+ stuffp->wreg_reset = stuffp->rreg_status = stuffp->wreg_data + 1;
+ stuffp->wreg_hcon = stuffp->wreg_reset + 1;
+ stuffp->wreg_chn = stuffp->wreg_hcon + 1;
+
+ init_waitqueue_head(&stuffp->busyq);
+ init_waitqueue_head(&stuffp->lockq);
+ init_waitqueue_head(&stuffp->sleepq);
+
+ /* check if i/o addresses are available */
+ if (!request_region(stuffp->wreg_data, MCDX_IO_SIZE, "mcdx")) {
+ xwarn("0x%03x,%d: Init failed. "
+ "I/O ports (0x%03x..0x%03x) already in use.\n",
+ stuffp->wreg_data, stuffp->irq,
+ stuffp->wreg_data,
+ stuffp->wreg_data + MCDX_IO_SIZE - 1);
+ xtrace(MALLOC, "init() free stuffp @ %p\n", stuffp);
+ kfree(stuffp);
+ put_disk(disk);
+ xtrace(INIT, "init() continue at next drive\n");
+ return 0; /* next drive */
+ }
+
+ xtrace(INIT, "init() i/o port is available at 0x%03x\n"
+ stuffp->wreg_data);
+ xtrace(INIT, "init() hardware reset\n");
+ mcdx_reset(stuffp, HARD, 1);
+
+ xtrace(INIT, "init() get version\n");
+ if (-1 == mcdx_requestversion(stuffp, &version, 4)) {
+ /* failed, next drive */
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ xwarn("%s=0x%03x,%d: Init failed. Can't get version.\n",
+ MCDX, stuffp->wreg_data, stuffp->irq);
+ xtrace(MALLOC, "init() free stuffp @ %p\n", stuffp);
+ kfree(stuffp);
+ put_disk(disk);
+ xtrace(INIT, "init() continue at next drive\n");
+ return 0;
+ }
+
+ switch (version.code) {
+ case 'D':
+ stuffp->readcmd = READ2X;
+ stuffp->present = DOUBLE | DOOR | MULTI;
+ break;
+ case 'F':
+ stuffp->readcmd = READ1X;
+ stuffp->present = SINGLE | DOOR | MULTI;
+ break;
+ case 'M':
+ stuffp->readcmd = READ1X;
+ stuffp->present = SINGLE;
+ break;
+ default:
+ stuffp->present = 0;
+ break;
+ }
+
+ stuffp->playcmd = READ1X;
+
+ if (!stuffp->present) {
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ xwarn("%s=0x%03x,%d: Init failed. No Mitsumi CD-ROM?.\n",
+ MCDX, stuffp->wreg_data, stuffp->irq);
+ kfree(stuffp);
+ put_disk(disk);
+ return 0; /* next drive */
+ }
+
+ xtrace(INIT, "init() register blkdev\n");
+ if (register_blkdev(MAJOR_NR, "mcdx")) {
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ kfree(stuffp);
+ put_disk(disk);
+ return 1;
+ }
+
+ mcdx_queue = blk_init_queue(do_mcdx_request, &mcdx_lock);
+ if (!mcdx_queue) {
+ unregister_blkdev(MAJOR_NR, "mcdx");
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ kfree(stuffp);
+ put_disk(disk);
+ return 1;
+ }
+
+ xtrace(INIT, "init() subscribe irq and i/o\n");
+ if (request_irq(stuffp->irq, mcdx_intr, SA_INTERRUPT, "mcdx", stuffp)) {
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ xwarn("%s=0x%03x,%d: Init failed. Can't get irq (%d).\n",
+ MCDX, stuffp->wreg_data, stuffp->irq, stuffp->irq);
+ stuffp->irq = 0;
+ blk_cleanup_queue(mcdx_queue);
+ kfree(stuffp);
+ put_disk(disk);
+ return 0;
+ }
+
+ xtrace(INIT, "init() get garbage\n");
+ {
+ int i;
+ mcdx_delay(stuffp, HZ / 2);
+ for (i = 100; i; i--)
+ (void) inb(stuffp->rreg_status);
+ }
+
+
+#if WE_KNOW_WHY
+ /* irq 11 -> channel register */
+ outb(0x50, stuffp->wreg_chn);
+#endif
+
+ xtrace(INIT, "init() set non dma but irq mode\n");
+ mcdx_config(stuffp, 1);
+
+ stuffp->info.ops = &mcdx_dops;
+ stuffp->info.speed = 2;
+ stuffp->info.capacity = 1;
+ stuffp->info.handle = stuffp;
+ sprintf(stuffp->info.name, "mcdx%d", drive);
+ disk->major = MAJOR_NR;
+ disk->first_minor = drive;
+ strcpy(disk->disk_name, stuffp->info.name);
+ disk->fops = &mcdx_bdops;
+ disk->flags = GENHD_FL_CD;
+ stuffp->disk = disk;
+
+ sprintf(msg, " mcdx: Mitsumi CD-ROM installed at 0x%03x, irq %d."
+ " (Firmware version %c %x)\n",
+ stuffp->wreg_data, stuffp->irq, version.code, version.ver);
+ mcdx_stuffp[drive] = stuffp;
+ xtrace(INIT, "init() mcdx_stuffp[%d] = %p\n", drive, stuffp);
+ if (register_cdrom(&stuffp->info) != 0) {
+ printk("Cannot register Mitsumi CD-ROM!\n");
+ free_irq(stuffp->irq, NULL);
+ release_region(stuffp->wreg_data, MCDX_IO_SIZE);
+ kfree(stuffp);
+ put_disk(disk);
+ if (unregister_blkdev(MAJOR_NR, "mcdx") != 0)
+ xwarn("cleanup() unregister_blkdev() failed\n");
+ blk_cleanup_queue(mcdx_queue);
+ return 2;
+ }
+ disk->private_data = stuffp;
+ disk->queue = mcdx_queue;
+ add_disk(disk);
+ printk(msg);
+ return 0;
+}
+
+int __init mcdx_init(void)
+{
+ int drive;
+ xwarn("Version 2.14(hs) \n");
+
+ xwarn("$Id: mcdx.c,v 1.21 1997/01/26 07:12:59 davem Exp $\n");
+
+ /* zero the pointer array */
+ for (drive = 0; drive < MCDX_NDRIVES; drive++)
+ mcdx_stuffp[drive] = NULL;
+
+ /* do the initialisation */
+ for (drive = 0; drive < MCDX_NDRIVES; drive++) {
+ switch (mcdx_init_drive(drive)) {
+ case 2:
+ return -EIO;
+ case 1:
+ break;
+ }
+ }
+ return 0;
+}
+
+static int mcdx_transfer(struct s_drive_stuff *stuffp,
+ char *p, int sector, int nr_sectors)
+/* This seems to do the actually transfer. But it does more. It
+ keeps track of errors occurred and will (if possible) fall back
+ to single speed on error.
+ Return: -1 on timeout or other error
+ else status byte (as in stuff->st) */
+{
+ int ans;
+
+ ans = mcdx_xfer(stuffp, p, sector, nr_sectors);
+ return ans;
+#if FALLBACK
+ if (-1 == ans)
+ stuffp->readerrs++;
+ else
+ return ans;
+
+ if (stuffp->readerrs && stuffp->readcmd == READ1X) {
+ xwarn("XXX Already reading 1x -- no chance\n");
+ return -1;
+ }
+
+ xwarn("XXX Fallback to 1x\n");
+
+ stuffp->readcmd = READ1X;
+ return mcdx_transfer(stuffp, p, sector, nr_sectors);
+#endif
+
+}
+
+
+static int mcdx_xfer(struct s_drive_stuff *stuffp,
+ char *p, int sector, int nr_sectors)
+/* This does actually the transfer from the drive.
+ Return: -1 on timeout or other error
+ else status byte (as in stuff->st) */
+{
+ int border;
+ int done = 0;
+ long timeout;
+
+ if (stuffp->audio) {
+ xwarn("Attempt to read from audio CD.\n");
+ return -1;
+ }
+
+ if (!stuffp->readcmd) {
+ xinfo("Can't transfer from missing disk.\n");
+ return -1;
+ }
+
+ while (stuffp->lock) {
+ interruptible_sleep_on(&stuffp->lockq);
+ }
+
+ if (stuffp->valid && (sector >= stuffp->pending)
+ && (sector < stuffp->low_border)) {
+
+ /* All (or at least a part of the sectors requested) seems
+ * to be already requested, so we don't need to bother the
+ * drive with new requests ...
+ * Wait for the drive become idle, but first
+ * check for possible occurred errors --- the drive
+ * seems to report them asynchronously */
+
+
+ border = stuffp->high_border < (border =
+ sector + nr_sectors)
+ ? stuffp->high_border : border;
+
+ stuffp->lock = current->pid;
+
+ do {
+
+ while (stuffp->busy) {
+
+ timeout =
+ interruptible_sleep_on_timeout
+ (&stuffp->busyq, 5 * HZ);
+
+ if (!stuffp->introk) {
+ xtrace(XFER,
+ "error via interrupt\n");
+ } else if (!timeout) {
+ xtrace(XFER, "timeout\n");
+ } else if (signal_pending(current)) {
+ xtrace(XFER, "signal\n");
+ } else
+ continue;
+
+ stuffp->lock = 0;
+ stuffp->busy = 0;
+ stuffp->valid = 0;
+
+ wake_up_interruptible(&stuffp->lockq);
+ xtrace(XFER, "transfer() done (-1)\n");
+ return -1;
+ }
+
+ /* check if we need to set the busy flag (as we
+ * expect an interrupt */
+ stuffp->busy = (3 == (stuffp->pending & 3));
+
+ /* Test if it's the first sector of a block,
+ * there we have to skip some bytes as we read raw data */
+ if (stuffp->xa && (0 == (stuffp->pending & 3))) {
+ const int HEAD =
+ CD_FRAMESIZE_RAW - CD_XA_TAIL -
+ CD_FRAMESIZE;
+ insb(stuffp->rreg_data, p, HEAD);
+ }
+
+ /* now actually read the data */
+ insb(stuffp->rreg_data, p, 512);
+
+ /* test if it's the last sector of a block,
+ * if so, we have to handle XA special */
+ if ((3 == (stuffp->pending & 3)) && stuffp->xa) {
+ char dummy[CD_XA_TAIL];
+ insb(stuffp->rreg_data, &dummy[0], CD_XA_TAIL);
+ }
+
+ if (stuffp->pending == sector) {
+ p += 512;
+ done++;
+ sector++;
+ }
+ } while (++(stuffp->pending) < border);
+
+ stuffp->lock = 0;
+ wake_up_interruptible(&stuffp->lockq);
+
+ } else {
+
+ /* The requested sector(s) is/are out of the
+ * already requested range, so we have to bother the drive
+ * with a new request. */
+
+ static unsigned char cmd[] = {
+ 0,
+ 0, 0, 0,
+ 0, 0, 0
+ };
+
+ cmd[0] = stuffp->readcmd;
+
+ /* The numbers held in ->pending, ..., should be valid */
+ stuffp->valid = 1;
+ stuffp->pending = sector & ~3;
+
+ /* do some sanity checks */
+ if (stuffp->pending > stuffp->lastsector) {
+ xwarn
+ ("transfer() sector %d from nirvana requested.\n",
+ stuffp->pending);
+ stuffp->status = MCDX_ST_EOM;
+ stuffp->valid = 0;
+ xtrace(XFER, "transfer() done (-1)\n");
+ return -1;
+ }
+
+ if ((stuffp->low_border = stuffp->pending + DIRECT_SIZE)
+ > stuffp->lastsector + 1) {
+ xtrace(XFER, "cut low_border\n");
+ stuffp->low_border = stuffp->lastsector + 1;
+ }
+ if ((stuffp->high_border = stuffp->pending + REQUEST_SIZE)
+ > stuffp->lastsector + 1) {
+ xtrace(XFER, "cut high_border\n");
+ stuffp->high_border = stuffp->lastsector + 1;
+ }
+
+ { /* Convert the sector to be requested to MSF format */
+ struct cdrom_msf0 pending;
+ log2msf(stuffp->pending / 4, &pending);
+ cmd[1] = pending.minute;
+ cmd[2] = pending.second;
+ cmd[3] = pending.frame;
+ }
+
+ cmd[6] =
+ (unsigned
+ char) ((stuffp->high_border - stuffp->pending) / 4);
+ xtrace(XFER, "[%2d]\n", cmd[6]);
+
+ stuffp->busy = 1;
+ /* Now really issue the request command */
+ outsb(stuffp->wreg_data, cmd, sizeof cmd);
+
+ }
+#ifdef AK2
+ if (stuffp->int_err) {
+ stuffp->valid = 0;
+ stuffp->int_err = 0;
+ return -1;
+ }
+#endif /* AK2 */
+
+ stuffp->low_border = (stuffp->low_border +=
+ done) <
+ stuffp->high_border ? stuffp->low_border : stuffp->high_border;
+
+ return done;
+}
+
+
+/* Access to elements of the mcdx_drive_map members */
+
+static unsigned port(int *ip)
+{
+ return ip[0];
+}
+static int irq(int *ip)
+{
+ return ip[1];
+}
+
+/* Misc number converters */
+
+static unsigned int bcd2uint(unsigned char c)
+{
+ return (c >> 4) * 10 + (c & 0x0f);
+}
+
+static unsigned int uint2bcd(unsigned int ival)
+{
+ return ((ival / 10) << 4) | (ival % 10);
+}
+
+static void log2msf(unsigned int l, struct cdrom_msf0 *pmsf)
+{
+ l += CD_MSF_OFFSET;
+ pmsf->minute = uint2bcd(l / 4500), l %= 4500;
+ pmsf->second = uint2bcd(l / 75);
+ pmsf->frame = uint2bcd(l % 75);
+}
+
+static unsigned int msf2log(const struct cdrom_msf0 *pmsf)
+{
+ return bcd2uint(pmsf->frame)
+ + bcd2uint(pmsf->second) * 75
+ + bcd2uint(pmsf->minute) * 4500 - CD_MSF_OFFSET;
+}
+
+int mcdx_readtoc(struct s_drive_stuff *stuffp)
+/* Read the toc entries from the CD,
+ * Return: -1 on failure, else 0 */
+{
+
+ if (stuffp->toc) {
+ xtrace(READTOC, "ioctl() toc already read\n");
+ return 0;
+ }
+
+ xtrace(READTOC, "ioctl() readtoc for %d tracks\n",
+ stuffp->di.n_last - stuffp->di.n_first + 1);
+
+ if (-1 == mcdx_hold(stuffp, 1))
+ return -1;
+
+ xtrace(READTOC, "ioctl() tocmode\n");
+ if (-1 == mcdx_setdrivemode(stuffp, TOC, 1))
+ return -EIO;
+
+ /* all seems to be ok so far ... malloc */
+ {
+ int size;
+ size =
+ sizeof(struct s_subqcode) * (stuffp->di.n_last -
+ stuffp->di.n_first + 2);
+
+ xtrace(MALLOC, "ioctl() malloc %d bytes\n", size);
+ stuffp->toc = kmalloc(size, GFP_KERNEL);
+ if (!stuffp->toc) {
+ xwarn("Cannot malloc %d bytes for toc\n", size);
+ mcdx_setdrivemode(stuffp, DATA, 1);
+ return -EIO;
+ }
+ }
+
+ /* now read actually the index */
+ {
+ int trk;
+ int retries;
+
+ for (trk = 0;
+ trk < (stuffp->di.n_last - stuffp->di.n_first + 1);
+ trk++)
+ stuffp->toc[trk].index = 0;
+
+ for (retries = 300; retries; retries--) { /* why 300? */
+ struct s_subqcode q;
+ unsigned int idx;
+
+ if (-1 == mcdx_requestsubqcode(stuffp, &q, 1)) {
+ mcdx_setdrivemode(stuffp, DATA, 1);
+ return -EIO;
+ }
+
+ idx = bcd2uint(q.index);
+
+ if ((idx > 0)
+ && (idx <= stuffp->di.n_last)
+ && (q.tno == 0)
+ && (stuffp->toc[idx - stuffp->di.n_first].
+ index == 0)) {
+ stuffp->toc[idx - stuffp->di.n_first] = q;
+ xtrace(READTOC,
+ "ioctl() toc idx %d (trk %d)\n",
+ idx, trk);
+ trk--;
+ }
+ if (trk == 0)
+ break;
+ }
+ memset(&stuffp->
+ toc[stuffp->di.n_last - stuffp->di.n_first + 1], 0,
+ sizeof(stuffp->toc[0]));
+ stuffp->toc[stuffp->di.n_last - stuffp->di.n_first +
+ 1].dt = stuffp->di.msf_leadout;
+ }
+
+ /* unset toc mode */
+ xtrace(READTOC, "ioctl() undo toc mode\n");
+ if (-1 == mcdx_setdrivemode(stuffp, DATA, 2))
+ return -EIO;
+
+#if MCDX_DEBUG && READTOC
+ {
+ int trk;
+ for (trk = 0;
+ trk < (stuffp->di.n_last - stuffp->di.n_first + 2);
+ trk++)
+ xtrace(READTOC, "ioctl() %d readtoc %02x %02x %02x"
+ " %02x:%02x.%02x %02x:%02x.%02x\n",
+ trk + stuffp->di.n_first,
+ stuffp->toc[trk].control,
+ stuffp->toc[trk].tno,
+ stuffp->toc[trk].index,
+ stuffp->toc[trk].tt.minute,
+ stuffp->toc[trk].tt.second,
+ stuffp->toc[trk].tt.frame,
+ stuffp->toc[trk].dt.minute,
+ stuffp->toc[trk].dt.second,
+ stuffp->toc[trk].dt.frame);
+ }
+#endif
+
+ return 0;
+}
+
+static int
+mcdx_playmsf(struct s_drive_stuff *stuffp, const struct cdrom_msf *msf)
+{
+ unsigned char cmd[7] = {
+ 0, 0, 0, 0, 0, 0, 0
+ };
+
+ if (!stuffp->readcmd) {
+ xinfo("Can't play from missing disk.\n");
+ return -1;
+ }
+
+ cmd[0] = stuffp->playcmd;
+
+ cmd[1] = msf->cdmsf_min0;
+ cmd[2] = msf->cdmsf_sec0;
+ cmd[3] = msf->cdmsf_frame0;
+ cmd[4] = msf->cdmsf_min1;
+ cmd[5] = msf->cdmsf_sec1;
+ cmd[6] = msf->cdmsf_frame1;
+
+ xtrace(PLAYMSF, "ioctl(): play %x "
+ "%02x:%02x:%02x -- %02x:%02x:%02x\n",
+ cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5], cmd[6]);
+
+ outsb(stuffp->wreg_data, cmd, sizeof cmd);
+
+ if (-1 == mcdx_getval(stuffp, 3 * HZ, 0, NULL)) {
+ xwarn("playmsf() timeout\n");
+ return -1;
+ }
+
+ stuffp->audiostatus = CDROM_AUDIO_PLAY;
+ return 0;
+}
+
+static int
+mcdx_playtrk(struct s_drive_stuff *stuffp, const struct cdrom_ti *ti)
+{
+ struct s_subqcode *p;
+ struct cdrom_msf msf;
+
+ if (-1 == mcdx_readtoc(stuffp))
+ return -1;
+
+ if (ti)
+ p = &stuffp->toc[ti->cdti_trk0 - stuffp->di.n_first];
+ else
+ p = &stuffp->start;
+
+ msf.cdmsf_min0 = p->dt.minute;
+ msf.cdmsf_sec0 = p->dt.second;
+ msf.cdmsf_frame0 = p->dt.frame;
+
+ if (ti) {
+ p = &stuffp->toc[ti->cdti_trk1 - stuffp->di.n_first + 1];
+ stuffp->stop = *p;
+ } else
+ p = &stuffp->stop;
+
+ msf.cdmsf_min1 = p->dt.minute;
+ msf.cdmsf_sec1 = p->dt.second;
+ msf.cdmsf_frame1 = p->dt.frame;
+
+ return mcdx_playmsf(stuffp, &msf);
+}
+
+
+/* Drive functions ************************************************/
+
+static int mcdx_tray_move(struct cdrom_device_info *cdi, int position)
+{
+ struct s_drive_stuff *stuffp = cdi->handle;
+
+ if (!stuffp->present)
+ return -ENXIO;
+ if (!(stuffp->present & DOOR))
+ return -ENOSYS;
+
+ if (position) /* 1: eject */
+ return mcdx_talk(stuffp, "\xf6", 1, NULL, 1, 5 * HZ, 3);
+ else /* 0: close */
+ return mcdx_talk(stuffp, "\xf8", 1, NULL, 1, 5 * HZ, 3);
+ return 1;
+}
+
+static int mcdx_stop(struct s_drive_stuff *stuffp, int tries)
+{
+ return mcdx_talk(stuffp, "\xf0", 1, NULL, 1, 2 * HZ, tries);
+}
+
+static int mcdx_hold(struct s_drive_stuff *stuffp, int tries)
+{
+ return mcdx_talk(stuffp, "\x70", 1, NULL, 1, 2 * HZ, tries);
+}
+
+static int mcdx_requestsubqcode(struct s_drive_stuff *stuffp,
+ struct s_subqcode *sub, int tries)
+{
+ char buf[11];
+ int ans;
+
+ if (-1 == (ans = mcdx_talk(stuffp, "\x20", 1, buf, sizeof(buf),
+ 2 * HZ, tries)))
+ return -1;
+ sub->control = buf[1];
+ sub->tno = buf[2];
+ sub->index = buf[3];
+ sub->tt.minute = buf[4];
+ sub->tt.second = buf[5];
+ sub->tt.frame = buf[6];
+ sub->dt.minute = buf[8];
+ sub->dt.second = buf[9];
+ sub->dt.frame = buf[10];
+
+ return ans;
+}
+
+static int mcdx_requestmultidiskinfo(struct s_drive_stuff *stuffp,
+ struct s_multi *multi, int tries)
+{
+ char buf[5];
+ int ans;
+
+ if (stuffp->present & MULTI) {
+ ans =
+ mcdx_talk(stuffp, "\x11", 1, buf, sizeof(buf), 2 * HZ,
+ tries);
+ multi->multi = buf[1];
+ multi->msf_last.minute = buf[2];
+ multi->msf_last.second = buf[3];
+ multi->msf_last.frame = buf[4];
+ return ans;
+ } else {
+ multi->multi = 0;
+ return 0;
+ }
+}
+
+static int mcdx_requesttocdata(struct s_drive_stuff *stuffp, struct s_diskinfo *info,
+ int tries)
+{
+ char buf[9];
+ int ans;
+ ans =
+ mcdx_talk(stuffp, "\x10", 1, buf, sizeof(buf), 2 * HZ, tries);
+ if (ans == -1) {
+ info->n_first = 0;
+ info->n_last = 0;
+ } else {
+ info->n_first = bcd2uint(buf[1]);
+ info->n_last = bcd2uint(buf[2]);
+ info->msf_leadout.minute = buf[3];
+ info->msf_leadout.second = buf[4];
+ info->msf_leadout.frame = buf[5];
+ info->msf_first.minute = buf[6];
+ info->msf_first.second = buf[7];
+ info->msf_first.frame = buf[8];
+ }
+ return ans;
+}
+
+static int mcdx_setdrivemode(struct s_drive_stuff *stuffp, enum drivemodes mode,
+ int tries)
+{
+ char cmd[2];
+ int ans;
+
+ xtrace(HW, "setdrivemode() %d\n", mode);
+
+ if (-1 == (ans = mcdx_talk(stuffp, "\xc2", 1, cmd, sizeof(cmd), 5 * HZ, tries)))
+ return -1;
+
+ switch (mode) {
+ case TOC:
+ cmd[1] |= 0x04;
+ break;
+ case DATA:
+ cmd[1] &= ~0x04;
+ break;
+ case RAW:
+ cmd[1] |= 0x40;
+ break;
+ case COOKED:
+ cmd[1] &= ~0x40;
+ break;
+ default:
+ break;
+ }
+ cmd[0] = 0x50;
+ return mcdx_talk(stuffp, cmd, 2, NULL, 1, 5 * HZ, tries);
+}
+
+static int mcdx_setdatamode(struct s_drive_stuff *stuffp, enum datamodes mode,
+ int tries)
+{
+ unsigned char cmd[2] = { 0xa0 };
+ xtrace(HW, "setdatamode() %d\n", mode);
+ switch (mode) {
+ case MODE0:
+ cmd[1] = 0x00;
+ break;
+ case MODE1:
+ cmd[1] = 0x01;
+ break;
+ case MODE2:
+ cmd[1] = 0x02;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return mcdx_talk(stuffp, cmd, 2, NULL, 1, 5 * HZ, tries);
+}
+
+static int mcdx_config(struct s_drive_stuff *stuffp, int tries)
+{
+ char cmd[4];
+
+ xtrace(HW, "config()\n");
+
+ cmd[0] = 0x90;
+
+ cmd[1] = 0x10; /* irq enable */
+ cmd[2] = 0x05; /* pre, err irq enable */
+
+ if (-1 == mcdx_talk(stuffp, cmd, 3, NULL, 1, 1 * HZ, tries))
+ return -1;
+
+ cmd[1] = 0x02; /* dma select */
+ cmd[2] = 0x00; /* no dma */
+
+ return mcdx_talk(stuffp, cmd, 3, NULL, 1, 1 * HZ, tries);
+}
+
+static int mcdx_requestversion(struct s_drive_stuff *stuffp, struct s_version *ver,
+ int tries)
+{
+ char buf[3];
+ int ans;
+
+ if (-1 == (ans = mcdx_talk(stuffp, "\xdc",
+ 1, buf, sizeof(buf), 2 * HZ, tries)))
+ return ans;
+
+ ver->code = buf[1];
+ ver->ver = buf[2];
+
+ return ans;
+}
+
+static int mcdx_reset(struct s_drive_stuff *stuffp, enum resetmodes mode, int tries)
+{
+ if (mode == HARD) {
+ outb(0, stuffp->wreg_chn); /* no dma, no irq -> hardware */
+ outb(0, stuffp->wreg_reset); /* hw reset */
+ return 0;
+ } else
+ return mcdx_talk(stuffp, "\x60", 1, NULL, 1, 5 * HZ, tries);
+}
+
+static int mcdx_lockdoor(struct cdrom_device_info *cdi, int lock)
+{
+ struct s_drive_stuff *stuffp = cdi->handle;
+ char cmd[2] = { 0xfe };
+
+ if (!(stuffp->present & DOOR))
+ return -ENOSYS;
+ if (stuffp->present & DOOR) {
+ cmd[1] = lock ? 0x01 : 0x00;
+ return mcdx_talk(stuffp, cmd, sizeof(cmd), NULL, 1, 5 * HZ, 3);
+ } else
+ return 0;
+}
+
+static int mcdx_getstatus(struct s_drive_stuff *stuffp, int tries)
+{
+ return mcdx_talk(stuffp, "\x40", 1, NULL, 1, 5 * HZ, tries);
+}
+
+static int
+mcdx_getval(struct s_drive_stuff *stuffp, int to, int delay, char *buf)
+{
+ unsigned long timeout = to + jiffies;
+ char c;
+
+ if (!buf)
+ buf = &c;
+
+ while (inb(stuffp->rreg_status) & MCDX_RBIT_STEN) {
+ if (time_after(jiffies, timeout))
+ return -1;
+ mcdx_delay(stuffp, delay);
+ }
+
+ *buf = (unsigned char) inb(stuffp->rreg_data) & 0xff;
+
+ return 0;
+}
+
+static int mcdx_setattentuator(struct s_drive_stuff *stuffp,
+ struct cdrom_volctrl *vol, int tries)
+{
+ char cmd[5];
+ cmd[0] = 0xae;
+ cmd[1] = vol->channel0;
+ cmd[2] = 0;
+ cmd[3] = vol->channel1;
+ cmd[4] = 0;
+
+ return mcdx_talk(stuffp, cmd, sizeof(cmd), NULL, 5, 200, tries);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_BLOCKDEV_MAJOR(MITSUMI_X_CDROM_MAJOR);