[POWERPC] Update the SWIM3 (powermac) floppy driver

Port the PowerMac floppy driver (swim3) to use the macio device
infrastructure.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 130 insertions, 100 deletions

diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 3721e12135d9..cc42e762396f 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -250,8 +250,6 @@ static int floppy_open(struct inode *inode, struct file *filp);
 static int floppy_release(struct inode *inode, struct file *filp);
 static int floppy_check_change(struct gendisk *disk);
 static int floppy_revalidate(struct gendisk *disk);
-static int swim3_add_device(struct device_node *swims);
-int swim3_init(void);
 
 #ifndef CONFIG_PMAC_MEDIABAY
 #define check_media_bay(which, what)    1
@@ -1011,114 +1009,63 @@ static struct block_device_operations floppy_fops = {
         .revalidate_disk= floppy_revalidate,
 };
 
-int swim3_init(void)
-{
-        struct device_node *swim;
-        int err = -ENOMEM;
-        int i;
-
-        swim = find_devices("floppy");
-        while (swim && (floppy_count < MAX_FLOPPIES))
-        {
-                swim3_add_device(swim);
-                swim = swim->next;
-        }
-
-        swim = find_devices("swim3");
-        while (swim && (floppy_count < MAX_FLOPPIES))
-        {
-                swim3_add_device(swim);
-                swim = swim->next;
-        }
-
-        if (!floppy_count)
-                return -ENODEV;
-
-        for (i = 0; i < floppy_count; i++) {
-                disks[i] = alloc_disk(1);
-                if (!disks[i])
-                        goto out;
-        }
-
-        if (register_blkdev(FLOPPY_MAJOR, "fd")) {
-                err = -EBUSY;
-                goto out;
-        }
-
-        swim3_queue = blk_init_queue(do_fd_request, &swim3_lock);
-        if (!swim3_queue) {
-                err = -ENOMEM;
-                goto out_queue;
-        }
-
-        for (i = 0; i < floppy_count; i++) {
-                struct gendisk *disk = disks[i];
-                disk->major = FLOPPY_MAJOR;
-                disk->first_minor = i;
-                disk->fops = &floppy_fops;
-                disk->private_data = &floppy_states[i];
-                disk->queue = swim3_queue;
-                disk->flags |= GENHD_FL_REMOVABLE;
-                sprintf(disk->disk_name, "fd%d", i);
-                set_capacity(disk, 2880);
-                add_disk(disk);
-        }
-        return 0;
-
-out_queue:
-        unregister_blkdev(FLOPPY_MAJOR, "fd");
-out:
-        while (i--)
-                put_disk(disks[i]);
-        /* shouldn't we do something with results of swim_add_device()? */
-        return err;
-}
-
-static int swim3_add_device(struct device_node *swim)
+static int swim3_add_device(struct macio_dev *mdev, int index)
 {
+        struct device_node *swim = mdev->ofdev.node;
         struct device_node *mediabay;
-        struct floppy_state *fs = &floppy_states[floppy_count];
-        struct resource res_reg, res_dma;
+        struct floppy_state *fs = &floppy_states[index];
+        int rc = -EBUSY;
 
-        if (of_address_to_resource(swim, 0, &res_reg) ||
-            of_address_to_resource(swim, 1, &res_dma)) {
-                printk(KERN_ERR "swim3: Can't get addresses\n");
-                return -EINVAL;
+        /* Check & Request resources */
+        if (macio_resource_count(mdev) < 2) {
+                printk(KERN_WARNING "ifd%d: no address for %s\n",
+                       index, swim->full_name);
+                return -ENXIO;
         }
-        if (request_mem_region(res_reg.start, res_reg.end - res_reg.start + 1,
-                               " (reg)") == NULL) {
-                printk(KERN_ERR "swim3: Can't request register space\n");
-                return -EINVAL;
+        if (macio_irq_count(mdev) < 2) {
+                printk(KERN_WARNING "fd%d: no intrs for device %s\n",
+                        index, swim->full_name);
         }
-        if (request_mem_region(res_dma.start, res_dma.end - res_dma.start + 1,
-                               " (dma)") == NULL) {
-                release_mem_region(res_reg.start,
-                                   res_reg.end - res_reg.start + 1);
-                printk(KERN_ERR "swim3: Can't request DMA space\n");
-                return -EINVAL;
+        if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
+                printk(KERN_ERR "fd%d: can't request mmio resource for %s\n",
+                       index, swim->full_name);
+                return -EBUSY;
         }
-
-        if (swim->n_intrs < 2) {
-                printk(KERN_INFO "swim3: expecting 2 intrs (n_intrs:%d)\n",
-                       swim->n_intrs);
-                release_mem_region(res_reg.start,
-                                   res_reg.end - res_reg.start + 1);
-                release_mem_region(res_dma.start,
-                                   res_dma.end - res_dma.start + 1);
-                return -EINVAL;
+        if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
+                printk(KERN_ERR "fd%d: can't request dma resource for %s\n",
+                       index, swim->full_name);
+                macio_release_resource(mdev, 0);
+                return -EBUSY;
         }
+        dev_set_drvdata(&mdev->ofdev.dev, fs);
 
-        mediabay = (strcasecmp(swim->parent->type, "media-bay") == 0) ? swim->parent : NULL;
+        mediabay = (strcasecmp(swim->parent->type, "media-bay") == 0) ?
+                swim->parent : NULL;
         if (mediabay == NULL)
                 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
         
         memset(fs, 0, sizeof(*fs));
         spin_lock_init(&fs->lock);
         fs->state = idle;
-        fs->swim3 = (struct swim3 __iomem *)ioremap(res_reg.start, 0x200);
-        fs->dma = (struct dbdma_regs __iomem *)ioremap(res_dma.start, 0x200);
-        fs->swim3_intr = swim->intrs[0].line;
-        fs->dma_intr = swim->intrs[1].line;
+        fs->swim3 = (struct swim3 __iomem *)
+                ioremap(macio_resource_start(mdev, 0), 0x200);
+        if (fs->swim3 == NULL) {
+                printk("fd%d: couldn't map registers for %s\n",
+                       index, swim->full_name);
+                rc = -ENOMEM;
+                goto out_release;
+        }
+        fs->dma = (struct dbdma_regs __iomem *)
+                ioremap(macio_resource_start(mdev, 1), 0x200);
+        if (fs->dma == NULL) {
+                printk("fd%d: couldn't map DMA for %s\n",
+                       index, swim->full_name);
+                iounmap(fs->swim3);
+                rc = -ENOMEM;
+                goto out_release;
+        }
+        fs->swim3_intr = macio_irq(mdev, 0);
+        fs->dma_intr = macio_irq(mdev, 1);;
         fs->cur_cyl = -1;
         fs->cur_sector = -1;
         fs->secpercyl = 36;
@@ -1132,15 +1079,16 @@ static int swim3_add_device(struct device_node *swim)
         st_le16(&fs->dma_cmd[1].command, DBDMA_STOP);
 
         if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
-                printk(KERN_ERR "Couldn't get irq %d for SWIM3\n", fs->swim3_intr);
+                printk(KERN_ERR "fd%d: couldn't request irq %d for %s\n",
+                       index, fs->swim3_intr, swim->full_name);
                 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
+                goto out_unmap;
                 return -EBUSY;
         }
 /*
         if (request_irq(fs->dma_intr, fd_dma_interrupt, 0, "SWIM3-dma", fs)) {
                 printk(KERN_ERR "Couldn't get irq %d for SWIM3 DMA",
                        fs->dma_intr);
-                pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
                 return -EBUSY;
         }
 */
@@ -1150,8 +1098,90 @@ static int swim3_add_device(struct device_node *swim)
         printk(KERN_INFO "fd%d: SWIM3 floppy controller %s\n", floppy_count,
                 mediabay ? "in media bay" : "");
 
-        floppy_count++;
-        
+        return 0;
+
+ out_unmap:
+        iounmap(fs->dma);
+        iounmap(fs->swim3);
+
+ out_release:
+        macio_release_resource(mdev, 0);
+        macio_release_resource(mdev, 1);
+
+        return rc;
+}
+
+static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match)
+{
+        int i, rc;
+        struct gendisk *disk;
+
+        /* Add the drive */
+        rc = swim3_add_device(mdev, floppy_count);
+        if (rc)
+                return rc;
+
+        /* Now create the queue if not there yet */
+        if (swim3_queue == NULL) {
+                /* If we failed, there isn't much we can do as the driver is still
+                 * too dumb to remove the device, just bail out
+                 */
+                if (register_blkdev(FLOPPY_MAJOR, "fd"))
+                        return 0;
+                swim3_queue = blk_init_queue(do_fd_request, &swim3_lock);
+                if (swim3_queue == NULL) {
+                        unregister_blkdev(FLOPPY_MAJOR, "fd");
+                        return 0;
+                }
+        }
+
+        /* Now register that disk. Same comment about failure handling */
+        i = floppy_count++;
+        disk = disks[i] = alloc_disk(1);
+        if (disk == NULL)
+                return 0;
+
+        disk->major = FLOPPY_MAJOR;
+        disk->first_minor = i;
+        disk->fops = &floppy_fops;
+        disk->private_data = &floppy_states[i];
+        disk->queue = swim3_queue;
+        disk->flags |= GENHD_FL_REMOVABLE;
+        sprintf(disk->disk_name, "fd%d", i);
+        set_capacity(disk, 2880);
+        add_disk(disk);
+
+        return 0;
+}
+
+static struct of_device_id swim3_match[] =
+{
+        {
+        .name           = "swim3",
+        },
+        {
+        .compatible     = "ohare-swim3"
+        },
+        {
+        .compatible     = "swim3"
+        },
+};
+
+static struct macio_driver swim3_driver =
+{
+        .name           = "swim3",
+        .match_table    = swim3_match,
+        .probe          = swim3_attach,
+#if 0
+        .suspend        = swim3_suspend,
+        .resume         = swim3_resume,
+#endif
+};
+
+
+int swim3_init(void)
+{
+        macio_register_driver(&swim3_driver);
         return 0;
 }