Added missing tegra files.HEADmaster

1 files changed, 739 insertions, 0 deletions

diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
new file mode 100644
index 00000000000..7878da89d29
--- /dev/null
+++ b/drivers/cdrom/viocd.c
@@ -0,0 +1,739 @@
+/* -*- linux-c -*-
+ *  drivers/cdrom/viocd.c
+ *
+ *  iSeries Virtual CD Rom
+ *
+ *  Authors: Dave Boutcher <boutcher@us.ibm.com>
+ *           Ryan Arnold <ryanarn@us.ibm.com>
+ *           Colin Devilbiss <devilbis@us.ibm.com>
+ *           Stephen Rothwell
+ *
+ * (C) Copyright 2000-2004 IBM Corporation
+ *
+ * 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 of the
+ * License, or (at your option) anyu 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; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This routine provides access to CD ROM drives owned and managed by an
+ * OS/400 partition running on the same box as this Linux partition.
+ *
+ * All operations are performed by sending messages back and forth to
+ * the OS/400 partition.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/major.h>
+#include <linux/blkdev.h>
+#include <linux/cdrom.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/completion.h>
+#include <linux/proc_fs.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.h>
+#include <linux/scatterlist.h>
+
+#include <asm/vio.h>
+#include <asm/iseries/hv_types.h>
+#include <asm/iseries/hv_lp_event.h>
+#include <asm/iseries/vio.h>
+#include <asm/firmware.h>
+
+#define VIOCD_DEVICE                    "iseries/vcd"
+
+#define VIOCD_VERS "1.06"
+
+/*
+ * Should probably make this a module parameter....sigh
+ */
+#define VIOCD_MAX_CD    HVMAXARCHITECTEDVIRTUALCDROMS
+
+static DEFINE_MUTEX(viocd_mutex);
+static const struct vio_error_entry viocd_err_table[] = {
+        {0x0201, EINVAL, "Invalid Range"},
+        {0x0202, EINVAL, "Invalid Token"},
+        {0x0203, EIO, "DMA Error"},
+        {0x0204, EIO, "Use Error"},
+        {0x0205, EIO, "Release Error"},
+        {0x0206, EINVAL, "Invalid CD"},
+        {0x020C, EROFS, "Read Only Device"},
+        {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"},
+        {0x020E, EIO, "Optical System Error (Varied Off?)"},
+        {0x02FF, EIO, "Internal Error"},
+        {0x3010, EIO, "Changed Volume"},
+        {0xC100, EIO, "Optical System Error"},
+        {0x0000, 0, NULL},
+};
+
+/*
+ * This is the structure we use to exchange info between driver and interrupt
+ * handler
+ */
+struct viocd_waitevent {
+        struct completion       com;
+        int                     rc;
+        u16                     sub_result;
+        int                     changed;
+};
+
+/* this is a lookup table for the true capabilities of a device */
+struct capability_entry {
+        char    *type;
+        int     capability;
+};
+
+static struct capability_entry capability_table[] __initdata = {
+        { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM },
+        { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM },
+        { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM },
+        { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM },
+        { "6321", CDC_LOCK },
+        { "632B", 0 },
+        { NULL  , CDC_LOCK },
+};
+
+/* These are our internal structures for keeping track of devices */
+static int viocd_numdev;
+
+struct disk_info {
+        struct gendisk                  *viocd_disk;
+        struct cdrom_device_info        viocd_info;
+        struct device                   *dev;
+        const char                      *rsrcname;
+        const char                      *type;
+        const char                      *model;
+};
+static struct disk_info viocd_diskinfo[VIOCD_MAX_CD];
+
+#define DEVICE_NR(di)   ((di) - &viocd_diskinfo[0])
+
+static spinlock_t viocd_reqlock;
+
+#define MAX_CD_REQ      1
+
+/* procfs support */
+static int proc_viocd_show(struct seq_file *m, void *v)
+{
+        int i;
+
+        for (i = 0; i < viocd_numdev; i++) {
+                seq_printf(m, "viocd device %d is iSeries resource %10.10s"
+                                "type %4.4s, model %3.3s\n",
+                                i, viocd_diskinfo[i].rsrcname,
+                                viocd_diskinfo[i].type,
+                                viocd_diskinfo[i].model);
+        }
+        return 0;
+}
+
+static int proc_viocd_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, proc_viocd_show, NULL);
+}
+
+static const struct file_operations proc_viocd_operations = {
+        .owner          = THIS_MODULE,
+        .open           = proc_viocd_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int viocd_blk_open(struct block_device *bdev, fmode_t mode)
+{
+        struct disk_info *di = bdev->bd_disk->private_data;
+        int ret;
+
+        mutex_lock(&viocd_mutex);
+        ret = cdrom_open(&di->viocd_info, bdev, mode);
+        mutex_unlock(&viocd_mutex);
+
+        return ret;
+}
+
+static int viocd_blk_release(struct gendisk *disk, fmode_t mode)
+{
+        struct disk_info *di = disk->private_data;
+        mutex_lock(&viocd_mutex);
+        cdrom_release(&di->viocd_info, mode);
+        mutex_unlock(&viocd_mutex);
+        return 0;
+}
+
+static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode,
+                unsigned cmd, unsigned long arg)
+{
+        struct disk_info *di = bdev->bd_disk->private_data;
+        int ret;
+
+        mutex_lock(&viocd_mutex);
+        ret = cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg);
+        mutex_unlock(&viocd_mutex);
+
+        return ret;
+}
+
+static unsigned int viocd_blk_check_events(struct gendisk *disk,
+                                           unsigned int clearing)
+{
+        struct disk_info *di = disk->private_data;
+        return cdrom_check_events(&di->viocd_info, clearing);
+}
+
+static const struct block_device_operations viocd_fops = {
+        .owner =                THIS_MODULE,
+        .open =                 viocd_blk_open,
+        .release =              viocd_blk_release,
+        .ioctl =                viocd_blk_ioctl,
+        .check_events =         viocd_blk_check_events,
+};
+
+static int viocd_open(struct cdrom_device_info *cdi, int purpose)
+{
+        struct disk_info *diskinfo = cdi->handle;
+        int device_no = DEVICE_NR(diskinfo);
+        HvLpEvent_Rc hvrc;
+        struct viocd_waitevent we;
+
+        init_completion(&we.com);
+        hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+                        HvLpEvent_Type_VirtualIo,
+                        viomajorsubtype_cdio | viocdopen,
+                        HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+                        viopath_sourceinst(viopath_hostLp),
+                        viopath_targetinst(viopath_hostLp),
+                        (u64)&we, VIOVERSION << 16, ((u64)device_no << 48),
+                        0, 0, 0);
+        if (hvrc != 0) {
+                pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+                           (int)hvrc);
+                return -EIO;
+        }
+
+        wait_for_completion(&we.com);
+
+        if (we.rc) {
+                const struct vio_error_entry *err =
+                        vio_lookup_rc(viocd_err_table, we.sub_result);
+                pr_warning("bad rc %d:0x%04X on open: %s\n",
+                           we.rc, we.sub_result, err->msg);
+                return -err->errno;
+        }
+
+        return 0;
+}
+
+static void viocd_release(struct cdrom_device_info *cdi)
+{
+        int device_no = DEVICE_NR((struct disk_info *)cdi->handle);
+        HvLpEvent_Rc hvrc;
+
+        hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+                        HvLpEvent_Type_VirtualIo,
+                        viomajorsubtype_cdio | viocdclose,
+                        HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
+                        viopath_sourceinst(viopath_hostLp),
+                        viopath_targetinst(viopath_hostLp), 0,
+                        VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0);
+        if (hvrc != 0)
+                pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+                           (int)hvrc);
+}
+
+/* Send a read or write request to OS/400 */
+static int send_request(struct request *req)
+{
+        HvLpEvent_Rc hvrc;
+        struct disk_info *diskinfo = req->rq_disk->private_data;
+        u64 len;
+        dma_addr_t dmaaddr;
+        int direction;
+        u16 cmd;
+        struct scatterlist sg;
+
+        BUG_ON(req->nr_phys_segments > 1);
+
+        if (rq_data_dir(req) == READ) {
+                direction = DMA_FROM_DEVICE;
+                cmd = viomajorsubtype_cdio | viocdread;
+        } else {
+                direction = DMA_TO_DEVICE;
+                cmd = viomajorsubtype_cdio | viocdwrite;
+        }
+
+        sg_init_table(&sg, 1);
+        if (blk_rq_map_sg(req->q, req, &sg) == 0) {
+                pr_warning("error setting up scatter/gather list\n");
+                return -1;
+        }
+
+        if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) {
+                pr_warning("error allocating sg tce\n");
+                return -1;
+        }
+        dmaaddr = sg_dma_address(&sg);
+        len = sg_dma_len(&sg);
+
+        hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+                        HvLpEvent_Type_VirtualIo, cmd,
+                        HvLpEvent_AckInd_DoAck,
+                        HvLpEvent_AckType_ImmediateAck,
+                        viopath_sourceinst(viopath_hostLp),
+                        viopath_targetinst(viopath_hostLp),
+                        (u64)req, VIOVERSION << 16,
+                        ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr,
+                        (u64)blk_rq_pos(req) * 512, len, 0);
+        if (hvrc != HvLpEvent_Rc_Good) {
+                pr_warning("hv error on op %d\n", (int)hvrc);
+                return -1;
+        }
+
+        return 0;
+}
+
+static int rwreq;
+
+static void do_viocd_request(struct request_queue *q)
+{
+        struct request *req;
+
+        while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) {
+                if (req->cmd_type != REQ_TYPE_FS)
+                        __blk_end_request_all(req, -EIO);
+                else if (send_request(req) < 0) {
+                        pr_warning("unable to send message to OS/400!\n");
+                        __blk_end_request_all(req, -EIO);
+                } else
+                        rwreq++;
+        }
+}
+
+static unsigned int viocd_check_events(struct cdrom_device_info *cdi,
+                                       unsigned int clearing, int disc_nr)
+{
+        struct viocd_waitevent we;
+        HvLpEvent_Rc hvrc;
+        int device_no = DEVICE_NR((struct disk_info *)cdi->handle);
+
+        init_completion(&we.com);
+
+        /* Send the open event to OS/400 */
+        hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+                        HvLpEvent_Type_VirtualIo,
+                        viomajorsubtype_cdio | viocdcheck,
+                        HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+                        viopath_sourceinst(viopath_hostLp),
+                        viopath_targetinst(viopath_hostLp),
+                        (u64)&we, VIOVERSION << 16, ((u64)device_no << 48),
+                        0, 0, 0);
+        if (hvrc != 0) {
+                pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+                           (int)hvrc);
+                return 0;
+        }
+
+        wait_for_completion(&we.com);
+
+        /* Check the return code.  If bad, assume no change */
+        if (we.rc) {
+                const struct vio_error_entry *err =
+                        vio_lookup_rc(viocd_err_table, we.sub_result);
+                pr_warning("bad rc %d:0x%04X on check_change: %s; Assuming no change\n",
+                           we.rc, we.sub_result, err->msg);
+                return 0;
+        }
+
+        return we.changed ? DISK_EVENT_MEDIA_CHANGE : 0;
+}
+
+static int viocd_lock_door(struct cdrom_device_info *cdi, int locking)
+{
+        HvLpEvent_Rc hvrc;
+        u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle);
+        /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */
+        u64 flags = !!locking;
+        struct viocd_waitevent we;
+
+        init_completion(&we.com);
+
+        /* Send the lockdoor event to OS/400 */
+        hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+                        HvLpEvent_Type_VirtualIo,
+                        viomajorsubtype_cdio | viocdlockdoor,
+                        HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+                        viopath_sourceinst(viopath_hostLp),
+                        viopath_targetinst(viopath_hostLp),
+                        (u64)&we, VIOVERSION << 16,
+                        (device_no << 48) | (flags << 32), 0, 0, 0);
+        if (hvrc != 0) {
+                pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+                           (int)hvrc);
+                return -EIO;
+        }
+
+        wait_for_completion(&we.com);
+
+        if (we.rc != 0)
+                return -EIO;
+        return 0;
+}
+
+static int viocd_packet(struct cdrom_device_info *cdi,
+                struct packet_command *cgc)
+{
+        unsigned int buflen = cgc->buflen;
+        int ret = -EIO;
+
+        switch (cgc->cmd[0]) {
+        case GPCMD_READ_DISC_INFO:
+                {
+                        disc_information *di = (disc_information *)cgc->buffer;
+
+                        if (buflen >= 2) {
+                                di->disc_information_length = cpu_to_be16(1);
+                                ret = 0;
+                        }
+                        if (buflen >= 3)
+                                di->erasable =
+                                        (cdi->ops->capability & ~cdi->mask
+                                         & (CDC_DVD_RAM | CDC_RAM)) != 0;
+                }
+                break;
+        case GPCMD_GET_CONFIGURATION:
+                if (cgc->cmd[3] == CDF_RWRT) {
+                        struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header));
+
+                        if ((buflen >=
+                             (sizeof(struct feature_header) + sizeof(*rfd))) &&
+                            (cdi->ops->capability & ~cdi->mask
+                             & (CDC_DVD_RAM | CDC_RAM))) {
+                                rfd->feature_code = cpu_to_be16(CDF_RWRT);
+                                rfd->curr = 1;
+                                ret = 0;
+                        }
+                }
+                break;
+        default:
+                if (cgc->sense) {
+                        /* indicate Unknown code */
+                        cgc->sense->sense_key = 0x05;
+                        cgc->sense->asc = 0x20;
+                        cgc->sense->ascq = 0x00;
+                }
+                break;
+        }
+
+        cgc->stat = ret;
+        return ret;
+}
+
+static void restart_all_queues(int first_index)
+{
+        int i;
+
+        for (i = first_index + 1; i < viocd_numdev; i++)
+                if (viocd_diskinfo[i].viocd_disk)
+                        blk_run_queue(viocd_diskinfo[i].viocd_disk->queue);
+        for (i = 0; i <= first_index; i++)
+                if (viocd_diskinfo[i].viocd_disk)
+                        blk_run_queue(viocd_diskinfo[i].viocd_disk->queue);
+}
+
+/* This routine handles incoming CD LP events */
+static void vio_handle_cd_event(struct HvLpEvent *event)
+{
+        struct viocdlpevent *bevent;
+        struct viocd_waitevent *pwe;
+        struct disk_info *di;
+        unsigned long flags;
+        struct request *req;
+
+
+        if (event == NULL)
+                /* Notification that a partition went away! */
+                return;
+        /* First, we should NEVER get an int here...only acks */
+        if (hvlpevent_is_int(event)) {
+                pr_warning("Yikes! got an int in viocd event handler!\n");
+                if (hvlpevent_need_ack(event)) {
+                        event->xRc = HvLpEvent_Rc_InvalidSubtype;
+                        HvCallEvent_ackLpEvent(event);
+                }
+        }
+
+        bevent = (struct viocdlpevent *)event;
+
+        switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
+        case viocdopen:
+                if (event->xRc == 0) {
+                        di = &viocd_diskinfo[bevent->disk];
+                        blk_queue_logical_block_size(di->viocd_disk->queue,
+                                                     bevent->block_size);
+                        set_capacity(di->viocd_disk,
+                                        bevent->media_size *
+                                        bevent->block_size / 512);
+                }
+                /* FALLTHROUGH !! */
+        case viocdlockdoor:
+                pwe = (struct viocd_waitevent *)event->xCorrelationToken;
+return_complete:
+                pwe->rc = event->xRc;
+                pwe->sub_result = bevent->sub_result;
+                complete(&pwe->com);
+                break;
+
+        case viocdcheck:
+                pwe = (struct viocd_waitevent *)event->xCorrelationToken;
+                pwe->changed = bevent->flags;
+                goto return_complete;
+
+        case viocdclose:
+                break;
+
+        case viocdwrite:
+        case viocdread:
+                /*
+                 * Since this is running in interrupt mode, we need to
+                 * make sure we're not stepping on any global I/O operations
+                 */
+                di = &viocd_diskinfo[bevent->disk];
+                spin_lock_irqsave(&viocd_reqlock, flags);
+                dma_unmap_single(di->dev, bevent->token, bevent->len,
+                                ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread)
+                                ?  DMA_FROM_DEVICE : DMA_TO_DEVICE);
+                req = (struct request *)bevent->event.xCorrelationToken;
+                rwreq--;
+
+                if (event->xRc != HvLpEvent_Rc_Good) {
+                        const struct vio_error_entry *err =
+                                vio_lookup_rc(viocd_err_table,
+                                                bevent->sub_result);
+                        pr_warning("request %p failed with rc %d:0x%04X: %s\n",
+                                   req, event->xRc,
+                                   bevent->sub_result, err->msg);
+                        __blk_end_request_all(req, -EIO);
+                } else
+                        __blk_end_request_all(req, 0);
+
+                /* restart handling of incoming requests */
+                spin_unlock_irqrestore(&viocd_reqlock, flags);
+                restart_all_queues(bevent->disk);
+                break;
+
+        default:
+                pr_warning("message with invalid subtype %0x04X!\n",
+                           event->xSubtype & VIOMINOR_SUBTYPE_MASK);
+                if (hvlpevent_need_ack(event)) {
+                        event->xRc = HvLpEvent_Rc_InvalidSubtype;
+                        HvCallEvent_ackLpEvent(event);
+                }
+        }
+}
+
+static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
+                             void *arg)
+{
+        return -EINVAL;
+}
+
+static struct cdrom_device_ops viocd_dops = {
+        .open = viocd_open,
+        .release = viocd_release,
+        .check_events = viocd_check_events,
+        .lock_door = viocd_lock_door,
+        .generic_packet = viocd_packet,
+        .audio_ioctl = viocd_audio_ioctl,
+        .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM
+};
+
+static int find_capability(const char *type)
+{
+        struct capability_entry *entry;
+
+        for(entry = capability_table; entry->type; ++entry)
+                if(!strncmp(entry->type, type, 4))
+                        break;
+        return entry->capability;
+}
+
+static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+{
+        struct gendisk *gendisk;
+        int deviceno;
+        struct disk_info *d;
+        struct cdrom_device_info *c;
+        struct request_queue *q;
+        struct device_node *node = vdev->dev.of_node;
+
+        deviceno = vdev->unit_address;
+        if (deviceno >= VIOCD_MAX_CD)
+                return -ENODEV;
+        if (!node)
+                return -ENODEV;
+
+        if (deviceno >= viocd_numdev)
+                viocd_numdev = deviceno + 1;
+
+        d = &viocd_diskinfo[deviceno];
+        d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL);
+        d->type = of_get_property(node, "linux,vio_type", NULL);
+        d->model = of_get_property(node, "linux,vio_model", NULL);
+
+        c = &d->viocd_info;
+
+        c->ops = &viocd_dops;
+        c->speed = 4;
+        c->capacity = 1;
+        c->handle = d;
+        c->mask = ~find_capability(d->type);
+        sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno);
+
+        if (register_cdrom(c) != 0) {
+                pr_warning("Cannot register viocd CD-ROM %s!\n", c->name);
+                goto out;
+        }
+        pr_info("cd %s is iSeries resource %10.10s type %4.4s, model %3.3s\n",
+                c->name, d->rsrcname, d->type, d->model);
+        q = blk_init_queue(do_viocd_request, &viocd_reqlock);
+        if (q == NULL) {
+                pr_warning("Cannot allocate queue for %s!\n", c->name);
+                goto out_unregister_cdrom;
+        }
+        gendisk = alloc_disk(1);
+        if (gendisk == NULL) {
+                pr_warning("Cannot create gendisk for %s!\n", c->name);
+                goto out_cleanup_queue;
+        }
+        gendisk->major = VIOCD_MAJOR;
+        gendisk->first_minor = deviceno;
+        strncpy(gendisk->disk_name, c->name,
+                        sizeof(gendisk->disk_name));
+        blk_queue_max_segments(q, 1);
+        blk_queue_max_hw_sectors(q, 4096 / 512);
+        gendisk->queue = q;
+        gendisk->fops = &viocd_fops;
+        gendisk->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE |
+                         GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
+        set_capacity(gendisk, 0);
+        gendisk->private_data = d;
+        d->viocd_disk = gendisk;
+        d->dev = &vdev->dev;
+        gendisk->driverfs_dev = d->dev;
+        add_disk(gendisk);
+        return 0;
+
+out_cleanup_queue:
+        blk_cleanup_queue(q);
+out_unregister_cdrom:
+        unregister_cdrom(c);
+out:
+        return -ENODEV;
+}
+
+static int viocd_remove(struct vio_dev *vdev)
+{
+        struct disk_info *d = &viocd_diskinfo[vdev->unit_address];
+
+        unregister_cdrom(&d->viocd_info);
+        del_gendisk(d->viocd_disk);
+        blk_cleanup_queue(d->viocd_disk->queue);
+        put_disk(d->viocd_disk);
+        return 0;
+}
+
+/**
+ * viocd_device_table: Used by vio.c to match devices that we
+ * support.
+ */
+static struct vio_device_id viocd_device_table[] __devinitdata = {
+        { "block", "IBM,iSeries-viocd" },
+        { "", "" }
+};
+MODULE_DEVICE_TABLE(vio, viocd_device_table);
+
+static struct vio_driver viocd_driver = {
+        .id_table = viocd_device_table,
+        .probe = viocd_probe,
+        .remove = viocd_remove,
+        .driver = {
+                .name = "viocd",
+                .owner = THIS_MODULE,
+        }
+};
+
+static int __init viocd_init(void)
+{
+        int ret = 0;
+
+        if (!firmware_has_feature(FW_FEATURE_ISERIES))
+                return -ENODEV;
+
+        if (viopath_hostLp == HvLpIndexInvalid) {
+                vio_set_hostlp();
+                /* If we don't have a host, bail out */
+                if (viopath_hostLp == HvLpIndexInvalid)
+                        return -ENODEV;
+        }
+
+        pr_info("vers " VIOCD_VERS ", hosting partition %d\n", viopath_hostLp);
+
+        if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) {
+                pr_warning("Unable to get major %d for %s\n",
+                           VIOCD_MAJOR, VIOCD_DEVICE);
+                return -EIO;
+        }
+
+        ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio,
+                        MAX_CD_REQ + 2);
+        if (ret) {
+                pr_warning("error opening path to host partition %d\n",
+                           viopath_hostLp);
+                goto out_unregister;
+        }
+
+        /* Initialize our request handler */
+        vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event);
+
+        spin_lock_init(&viocd_reqlock);
+
+        ret = vio_register_driver(&viocd_driver);
+        if (ret)
+                goto out_free_info;
+
+        proc_create("iSeries/viocd", S_IFREG|S_IRUGO, NULL,
+                    &proc_viocd_operations);
+        return 0;
+
+out_free_info:
+        vio_clearHandler(viomajorsubtype_cdio);
+        viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2);
+out_unregister:
+        unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE);
+        return ret;
+}
+
+static void __exit viocd_exit(void)
+{
+        remove_proc_entry("iSeries/viocd", NULL);
+        vio_unregister_driver(&viocd_driver);
+        viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2);
+        vio_clearHandler(viomajorsubtype_cdio);
+        unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE);
+}
+
+module_init(viocd_init);
+module_exit(viocd_exit);
+MODULE_LICENSE("GPL");