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authorRudolf Marek <r.marek@assembler.cz>2008-09-19 22:58:59 +0000
committerRudolf Marek <r.marek@assembler.cz>2008-09-19 22:58:59 +0000
commit0b0771d180d5b18a3d698ccac54449112a9fca91 (patch)
treedf7be41b042262a4ac04f72b48ff61c71df5e0e7 /src/southbridge
parentc4128cfbec0d496873b9a2a684cf32a23b17137d (diff)
downloadcoreboot-0b0771d180d5b18a3d698ccac54449112a9fca91.tar.xz
Attached patch fixes at least one issue ;) During the PCI BAR sizing must be the
D1F0 bridge without activated I/O and MEM resources, otherwise it will hang whole PCI bus. U-boot is also disabling the IO/MEM decode when sizing the BARs, dont know why does we not. Second small change just changes a bit which controls the PSTATECTL logic. Third change deals with the integrated VGA, which needs to be enabled early, so the VGA_EN is set along the bridges, and PCI K8 resource maps are set correctly. Finally the CPU accessible framebuffer is now disabled as it is not needed. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3587 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/via/k8t890/k8t890_bridge.c8
-rw-r--r--src/southbridge/via/k8t890/k8t890_dram.c23
-rw-r--r--src/southbridge/via/k8t890/k8t890_host_ctrl.c4
3 files changed, 22 insertions, 13 deletions
diff --git a/src/southbridge/via/k8t890/k8t890_bridge.c b/src/southbridge/via/k8t890/k8t890_bridge.c
index be1ba721ef..44347127f6 100644
--- a/src/southbridge/via/k8t890/k8t890_bridge.c
+++ b/src/southbridge/via/k8t890/k8t890_bridge.c
@@ -24,8 +24,8 @@
static void bridge_enable(struct device *dev)
{
+ u8 tmp;
print_debug("B188 device dump\n");
-
/* VIA recommends this, sorry no known info. */
writeback(dev, 0x40, 0x91);
@@ -44,6 +44,12 @@ static void bridge_enable(struct device *dev)
writeback(dev, 0x3e, 0x16);
dump_south(dev);
+
+ /* disable I/O and memory decode, or it freezes PCI bus during BAR sizing */
+ tmp = pci_read_config8(dev, PCI_COMMAND);
+ tmp &= ~0x3;
+ pci_write_config8(dev, PCI_COMMAND, tmp);
+
}
static const struct device_operations bridge_ops = {
diff --git a/src/southbridge/via/k8t890/k8t890_dram.c b/src/southbridge/via/k8t890/k8t890_dram.c
index 00e5fa5f24..1c60a78a13 100644
--- a/src/southbridge/via/k8t890/k8t890_dram.c
+++ b/src/southbridge/via/k8t890/k8t890_dram.c
@@ -63,6 +63,15 @@ static void dram_enable(struct device *dev)
/* The Address Next to the Last Valid DRAM Address */
pci_write_config16(dev, 0x88, (msr.lo >> 24) | reg);
+
+}
+
+static void dram_enable_k8m890(struct device *dev)
+{
+ dram_enable(dev);
+
+ /* enable VGA, so the bridges gets VGA_EN and resources are set */
+ pci_write_config8(dev, 0xa1, 0x80);
}
static struct resource *resmax;
@@ -113,17 +122,11 @@ static void dram_init_fb(struct device *dev)
printk_debug("VIA FB proposed base: %llx\n", proposed_base);
- /* enable UMA but no FB */
+ /* Step 1: enable UMA but no FB */
pci_write_config8(dev, 0xa1, 0x80);
- /* 27:21 goes to 7:1, 0 is enable CPU access */
- tmp = (proposed_base >> 20) | 0x1;
- pci_write_config8(dev, 0xa0, tmp);
-
- /* 31:28 goes to 3:0 */
- tmp = ((proposed_base >> 28) & 0xf);
- tmp = ((log2(K8M890_FBSIZEMB) - 2) << 4);
- tmp |= 0x80;
+ /* Step 2: enough is just the FB size, the CPU accessible address is not needed */
+ tmp = ((log2(K8M890_FBSIZEMB) - 2) << 4) | 0x80;
pci_write_config8(dev, 0xa1, tmp);
/* TODO K8 needs some UMA fine tuning too maybe call some generic routine here? */
@@ -141,7 +144,7 @@ static const struct device_operations dram_ops_m = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
- .enable = dram_enable,
+ .enable = dram_enable_k8m890,
.init = dram_init_fb,
.ops_pci = 0,
};
diff --git a/src/southbridge/via/k8t890/k8t890_host_ctrl.c b/src/southbridge/via/k8t890/k8t890_host_ctrl.c
index f2bc88ad65..faa498e8b0 100644
--- a/src/southbridge/via/k8t890/k8t890_host_ctrl.c
+++ b/src/southbridge/via/k8t890/k8t890_host_ctrl.c
@@ -105,8 +105,8 @@ static void host_ctrl_enable_k8m890(struct device *dev) {
/* Arbitration control */
pci_write_config8(dev, 0xa5, 0x3c);
- /* Arbitration control 2 */
- pci_write_config8(dev, 0xa6, 0x82);
+ /* Arbitration control 2, Enable C2NOW delay to PSTATECTL */
+ pci_write_config8(dev, 0xa6, 0x83);
}