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path: root/drivers/video/matrox
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-rw-r--r--drivers/video/matrox/matroxfb_misc.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/video/matrox/matroxfb_misc.c b/drivers/video/matrox/matroxfb_misc.c
index a18dd024fc86..d9d3e9f6c08e 100644
--- a/drivers/video/matrox/matroxfb_misc.c
+++ b/drivers/video/matrox/matroxfb_misc.c
@@ -68,6 +68,9 @@
* "David C. Hansen" <haveblue@us.ibm.com>
* Fixes
*
+ * "Ian Romanick" <idr@us.ibm.com>
+ * Find PInS data in BIOS on PowerPC systems.
+ *
* (following author is not in any relation with this code, but his code
* is included in this driver)
*
@@ -496,10 +499,35 @@ static void parse_bios(unsigned char __iomem* vbios, struct matrox_bios* bd) {
get_bios_version(vbios, bd);
get_bios_output(vbios, bd);
get_bios_tvout(vbios, bd);
+#if defined(__powerpc__)
+ /* On PowerPC cards, the PInS offset isn't stored at the end of the
+ * BIOS image. Instead, you must search the entire BIOS image for
+ * the magic PInS signature.
+ *
+ * This actually applies to all OpenFirmware base cards. Since these
+ * cards could be put in a MIPS or SPARC system, should the condition
+ * be something different?
+ */
+ for ( pins_offset = 0 ; pins_offset <= 0xFF80 ; pins_offset++ ) {
+ unsigned char header[3];
+
+ header[0] = readb(vbios + pins_offset);
+ header[1] = readb(vbios + pins_offset + 1);
+ header[2] = readb(vbios + pins_offset + 2);
+ if ( (header[0] == 0x2E) && (header[1] == 0x41)
+ && ((header[2] == 0x40) || (header[2] == 0x80)) ) {
+ printk(KERN_INFO "PInS data found at offset %u\n",
+ pins_offset);
+ get_pins(vbios + pins_offset, bd);
+ break;
+ }
+ }
+#else
pins_offset = readb(vbios + 0x7FFC) | (readb(vbios + 0x7FFD) << 8);
if (pins_offset <= 0xFF80) {
get_pins(vbios + pins_offset, bd);
}
+#endif
}
#define get_u16(x) (le16_to_cpu(get_unaligned((__u16*)(x))))
@@ -755,6 +783,8 @@ void matroxfb_read_pins(WPMINFO2) {
}
#endif
matroxfb_set_limits(PMINFO &ACCESS_FBINFO(bios));
+ printk(KERN_INFO "PInS memtype = %u\n",
+ (ACCESS_FBINFO(values).reg.opt & 0x1C00) >> 10);
}
EXPORT_SYMBOL(matroxfb_DAC_in);