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authorGary Jennejohn <garyj@denx.de>2007-08-31 15:21:46 +0200
committerStefan Roese <sr@denx.de>2007-08-31 15:21:46 +0200
commit81b73dec16fd1227369a191e725e10044a9d56b8 (patch)
tree3d0fe0f95120227c7ced28cc3ff742e35d22dd71 /drivers/pci_auto.c
parent9c02defc29b57945b600714cf61ddfd02b02fb14 (diff)
ppc4xx: (Re-)Enable CONFIG_PCI_PNP on AMCC 440EPx Sequoia
The 440EPx has a problem when the PCI_CACHE_LINE_SIZE register is set to non-zero, because it doesn't support MRM (memory-read- multiple) correctly. We now added the possibility to configure this register in the board config file, so that the default value of 8 can be overridden. Here the details of this patch: o drivers_pci_auto.c: introduce CFG_PCI_CACHE_LINE_SIZE to allow board-specific settings. As an example the sequoia board requires 0. Idea from Stefan Roese <sr@denx.de>. o board/amcc/sequoia/init.S: add a TLB mapping at 0xE8000000 for the PCI IO-space. Obtained from Stefan Roese <sr@denx.de>. o include/configs/sequoia.h: turn CONFIG_PCI_PNP back on and set CFG_PCI_CACHE_LINE_SIZE to 0. Signed-off-by: Gary Jennejohn <garyj@denx.de> Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/pci_auto.c')
-rw-r--r--drivers/pci_auto.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c
index 2378553be5..acfda83ba5 100644
--- a/drivers/pci_auto.c
+++ b/drivers/pci_auto.c
@@ -28,6 +28,11 @@
#define PCIAUTO_IDE_MODE_MASK 0x05
+/* the user can define CFG_PCI_CACHE_LINE_SIZE to avoid problems */
+#ifndef CFG_PCI_CACHE_LINE_SIZE
+#define CFG_PCI_CACHE_LINE_SIZE 8
+#endif
+
/*
*
*/
@@ -150,7 +155,8 @@ void pciauto_setup_device(struct pci_controller *hose,
}
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
- pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
+ pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE,
+ CFG_PCI_CACHE_LINE_SIZE);
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
}