[PATCH 1/5] gxt4500: enable on non-PPC architectures

From: Ondrej Zary
Date: Tue Feb 17 2015 - 17:35:46 EST

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@xxxxxxxxxxxxxxxxxxxx>
drivers/video/fbdev/Kconfig | 5 +++--
drivers/video/fbdev/gxt4500.c | 7 +++++++
2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 08a7a04..cb15734 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -2143,7 +2143,7 @@ config FB_UDL

config FB_IBM_GXT4500
tristate "Framebuffer support for IBM GXT4000P/4500P/6000P/6500P adaptors"
- depends on FB && PPC
+ depends on FB
@@ -2151,7 +2151,8 @@ 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 135d78a..1bf9894 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);

info->fbops = &gxt4500_ops;
info->flags = FBINFO_FLAG_DEFAULT;
Ondrej Zary

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