gxt4500: enable on non-PPC architectures

These chips can be present at least on x86 too - Fire GL2 AGP has GXT6000P but
this driver is currently limited to PPC.
Enable it for all architectures and add chip configuration for little-endian.

Tested on x86 with Fire GL2 AGP.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

2 files changed, 10 insertions, 2 deletions

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 5d67226a1cee..e6d16d65e4e6 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -2134,7 +2134,7 @@ config FB_UDL
 
 config FB_IBM_GXT4500
         tristate "Framebuffer support for IBM GXT4000P/4500P/6000P/6500P adaptors"
-        depends on FB && PPC
+        depends on FB
         select FB_CFB_FILLRECT
         select FB_CFB_COPYAREA
         select FB_CFB_IMAGEBLIT
@@ -2142,7 +2142,8 @@ config FB_IBM_GXT4500
           Say Y here to enable support for the IBM GXT4000P/6000P and
           GXT4500P/6500P display adaptor based on Raster Engine RC1000,
           found on some IBM System P (pSeries) machines. This driver
-          doesn't use Geometry Engine GT1000.
+          doesn't use Geometry Engine GT1000. This driver also supports
+          AGP Fire GL2/3/4 cards on x86.
 
 config FB_PS3
         tristate "PS3 GPU framebuffer driver"
diff --git a/drivers/video/fbdev/gxt4500.c b/drivers/video/fbdev/gxt4500.c
index f19133a80e8c..ae686962f3d3 100644
--- a/drivers/video/fbdev/gxt4500.c
+++ b/drivers/video/fbdev/gxt4500.c
@@ -670,8 +670,15 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         pci_set_drvdata(pdev, info);
 
+#ifdef __BIG_ENDIAN
         /* Set byte-swapping for DFA aperture for all pixel sizes */
         pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);
+#else /* __LITTLE_ENDIAN */
+        /* not sure what this means but fgl23 driver does that */
+        pci_write_config_dword(pdev, CFG_ENDIAN0, 0x2300);
+/*      pci_write_config_dword(pdev, CFG_ENDIAN0 + 4, 0x400000);*/
+        pci_write_config_dword(pdev, CFG_ENDIAN0 + 8, 0x98530000);
+#endif
 
         info->fbops = &gxt4500_ops;
         info->flags = FBINFO_FLAG_DEFAULT;