From b341e32e5cc1a154cb0ac2f4229c2d040647804b Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 17 Nov 2005 13:34:57 +1100 Subject: [PATCH] [PATCH] powerpc: Workaround for offb on 64 bits platforms This fixes a problem with offb not parsing addresses properly on 64 bits machines, and thus crashing at boot. The problem is worked around by locating the matching PCI device and using the properly relocated PCI base addresses instead of misparsing the Open Firmware properties. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- drivers/video/offb.c | 40 +++++++++++++++++++++++++++++++++++----- 1 file changed, 35 insertions(+), 5 deletions(-) diff --git a/drivers/video/offb.c b/drivers/video/offb.c index 2c85683869..fe8ba364b3 100644 --- a/drivers/video/offb.c +++ b/drivers/video/offb.c @@ -325,8 +325,8 @@ static void __init offb_init_nodriver(struct device_node *dp) int *pp, i; unsigned int len; int width = 640, height = 480, depth = 8, pitch; - unsigned *up; - unsigned long address; + unsigned int rsize, *up; + unsigned long address = 0; if ((pp = (int *) get_property(dp, "depth", &len)) != NULL && len == sizeof(int)) @@ -344,10 +344,40 @@ static void __init offb_init_nodriver(struct device_node *dp) pitch = 0x1000; } else pitch = width; - if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL - && len == sizeof(unsigned)) + + rsize = (unsigned long)pitch * (unsigned long)height * + (unsigned long)(depth / 8); + + /* Try to match device to a PCI device in order to get a properly + * translated address rather then trying to decode the open firmware + * stuff in various incorrect ways + */ +#ifdef CONFIG_PCI + /* First try to locate the PCI device if any */ + { + struct pci_dev *pdev = NULL; + + for_each_pci_dev(pdev) { + if (dp == pci_device_to_OF_node(pdev)) + break; + } + if (pdev) { + for (i = 0; i < 6 && address == 0; i++) { + if ((pci_resource_flags(pdev, i) & + IORESOURCE_MEM) && + (pci_resource_len(pdev, i) >= rsize)) + address = pci_resource_start(pdev, i); + } + pci_dev_put(pdev); + } + } +#endif /* CONFIG_PCI */ + + if (address == 0 && + (up = (unsigned *) get_property(dp, "address", &len)) != NULL && + len == sizeof(unsigned)) address = (u_long) * up; - else { + if (address == 0) { for (i = 0; i < dp->n_addrs; ++i) if (dp->addrs[i].size >= pitch * height * depth / 8) -- 2.39.5