diff options
Diffstat (limited to 'drivers/video/matrox/matroxfb_misc.c')
| -rw-r--r-- | drivers/video/matrox/matroxfb_misc.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/video/matrox/matroxfb_misc.c b/drivers/video/matrox/matroxfb_misc.c index a18dd024fc8..d9d3e9f6c08 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); |