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fbdev/cirrusfb: Add support for "64 MiB" version of Picasso IV 

Some Village Tronic Picasso IV graphics cards identify as a 64 MiB Zorro
device in Zorro III mode.

While the total graphics memory size is the same on such cards, the offset
of the graphics memory differs. Add a quirk to handle this.

Based on src/sys/arch/amiga/dev/grf_cl.c from NetBSD.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This commit is contained in:
Geert Uytterhoeven 2011-10-20 13:42:25 +02:00 committed by Florian Tobias Schandinat
parent 17bdf48952
commit e78bb882bf
1 changed files with 5 additions and 1 deletions
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6
drivers/video/cirrusfb.c
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@ -314,7 +314,7 @@ static const struct zorrocl zcl_picasso4_z3 __devinitconst = {
.type = BT_PICASSO4,
.regoffset = 0x00600000,
.ramsize = 4 * MB_,
.ramoffset = 0x01000000,
.ramoffset = 0x01000000, /* 0x02000000 for 64 MiB boards */
};
static const struct zorrocl zcl_picasso4_z2 __devinitconst = {
@ -2259,6 +2259,10 @@ static int __devinit cirrusfb_zorro_register(struct zorro_dev *z,
ramsize = zcl->ramsize;
if (ramsize) {
rambase = zorro_resource_start(z) + zcl->ramoffset;
if (zorro_resource_len(z) == 64 * MB_) {
/* Quirk for 64 MiB Picasso IV */
rambase += zcl->ramoffset;
}
} else {
struct zorro_dev *ram = zorro_find_device(zcl->ramid, NULL);
if (!ram || !zorro_resource_len(ram)) {