The patch titled
matroxfb: read MGA PInS data on PowerPC
has been added to the -mm tree. Its filename is
matroxfb-read-mga-pins-data-on-powerpc.patch
Patches currently in -mm which might be from [EMAIL PROTECTED] are
serial-add-support-for-non-standard-xtals-to-16c950-driver.patch
add-support-for-possio-gcc-aka-pcmcia-siemens-mc45.patch
matroxfb-read-mga-pins-data-on-powerpc.patch
From: Petr Vandrovec <[EMAIL PROTECTED]>
This updates the matroxfb code so that it can find the PInS data embedded
in the BIOS on PowerPC cards. The process for finding the data is
different on OpenFirmware cards than on x86 cards, and the code for doing
so was missing.
After patching, building, installing, and booting a kernel, you should grep
for "PInS" in /var/log/messages. You should see two messages in the log:
PInS data found at offset XXXXX
PInS memtype = X
On the GXT135p card I get "31168" and "5". The first value is irrelevant,
but it's presence lets me know that the PInS data was actually found. On a
GXT130p, the second value should be 3. Since I don't have access to that
hardware, if someone can verify that, I will submit a follow-on patch that
rips out all the memtype parameter stuff.
Signed-off-by: Ian Romanick <[EMAIL PROTECTED]>
Signed-off-by: Petr Vandrovec <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/video/matrox/matroxfb_misc.c | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+)
diff -puN
drivers/video/matrox/matroxfb_misc.c~matroxfb-read-mga-pins-data-on-powerpc
drivers/video/matrox/matroxfb_misc.c
---
25/drivers/video/matrox/matroxfb_misc.c~matroxfb-read-mga-pins-data-on-powerpc
Mon Aug 29 15:19:30 2005
+++ 25-akpm/drivers/video/matrox/matroxfb_misc.c Mon Aug 29 15:19:30 2005
@@ -68,6 +68,9 @@
* "David C. Hansen" <[EMAIL PROTECTED]>
* Fixes
*
+ * "Ian Romanick" <[EMAIL PROTECTED]>
+ * 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 __i
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);
_
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