[POWERPC] Fix platinumfb framebuffer

Current kernels have a non-working platinumfb due to some resource
management issues.  This fixes it.

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

1 files changed, 26 insertions, 22 deletions

diff --git a/drivers/video/platinumfb.c b/drivers/video/platinumfb.c
index 8503e733a172..cbe71a5338d0 100644
--- a/drivers/video/platinumfb.c
+++ b/drivers/video/platinumfb.c
@@ -17,6 +17,8 @@
  *  more details.
  */
 
+#undef DEBUG
+
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -535,33 +537,35 @@ static int __devinit platinumfb_probe(struct of_device* odev,
         volatile __u8           *fbuffer;
         int                     bank0, bank1, bank2, bank3, rc;
 
-        printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n");
+        dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 
         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
-        if (info == NULL)
+        if (info == NULL) {
+                dev_err(&odev->dev, "Failed to allocate fbdev !\n");
                 return -ENOMEM;
+        }
         pinfo = info->par;
 
         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
-                printk(KERN_ERR "platinumfb: Can't get resources\n");
-                framebuffer_release(info);
-                return -ENXIO;
-        }
-        if (!request_mem_region(pinfo->rsrc_reg.start,
-                                pinfo->rsrc_reg.start -
-                                pinfo->rsrc_reg.end + 1,
-                                "platinumfb registers")) {
+                dev_err(&odev->dev, "Can't get resources\n");
                 framebuffer_release(info);
                 return -ENXIO;
         }
+        dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
+                (unsigned long long)pinfo->rsrc_reg.start,
+                (unsigned long long)pinfo->rsrc_reg.end);
+        dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
+                (unsigned long long)pinfo->rsrc_fb.start,
+                (unsigned long long)pinfo->rsrc_fb.end);
+
+        /* Do not try to request register space, they overlap with the
+         * northbridge and that can fail. Only request framebuffer
+         */
         if (!request_mem_region(pinfo->rsrc_fb.start,
-                                pinfo->rsrc_fb.start
-                                - pinfo->rsrc_fb.end + 1,
+                                pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
                                 "platinumfb framebuffer")) {
-                release_mem_region(pinfo->rsrc_reg.start,
-                                   pinfo->rsrc_reg.end -
-                                   pinfo->rsrc_reg.start + 1);
+                printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
                 framebuffer_release(info);
                 return -ENXIO;
         }
@@ -600,7 +604,8 @@ static int __devinit platinumfb_probe(struct of_device* odev,
         bank2 = fbuffer[0x200000] == 0x56;
         bank3 = fbuffer[0x300000] == 0x78;
         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
-        printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024),
+        printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
+               (unsigned int) (pinfo->total_vram / 1024 / 1024),
                bank3, bank2, bank1, bank0);
 
         /*
@@ -644,16 +649,15 @@ static int __devexit platinumfb_remove(struct of_device* odev)
         unregister_framebuffer (info);
         
         /* Unmap frame buffer and registers */
+        iounmap(pinfo->frame_buffer);
+        iounmap(pinfo->platinum_regs);
+        iounmap(pinfo->cmap_regs);
+
         release_mem_region(pinfo->rsrc_fb.start,
                            pinfo->rsrc_fb.end -
                            pinfo->rsrc_fb.start + 1);
-        release_mem_region(pinfo->rsrc_reg.start,
-                           pinfo->rsrc_reg.end -
-                           pinfo->rsrc_reg.start + 1);
-        iounmap(pinfo->frame_buffer);
-        iounmap(pinfo->platinum_regs);
+
         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
-        iounmap(pinfo->cmap_regs);
 
         framebuffer_release(info);