x86: ivybridge: Enable PCI in early init

Enable PCI so we can access devices that need to be set up before relocation.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 67 insertions, 0 deletions

diff --git a/arch/x86/cpu/ivybridge/Makefile b/arch/x86/cpu/ivybridge/Makefile
index dbcd4bd..6d0a78d 100644
--- a/arch/x86/cpu/ivybridge/Makefile
+++ b/arch/x86/cpu/ivybridge/Makefile
@@ -6,4 +6,5 @@
 
 obj-y += car.o
 obj-y += cpu.o
+obj-y += pci.o
 obj-y += sdram.o
diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
index 5863811..ff6b7b3 100644
--- a/arch/x86/cpu/ivybridge/cpu.c
+++ b/arch/x86/cpu/ivybridge/cpu.c
@@ -12,6 +12,7 @@
 
 #include <common.h>
 #include <asm/cpu.h>
+#include <asm/pci.h>
 #include <asm/post.h>
 #include <asm/processor.h>
 
@@ -19,6 +20,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 int arch_cpu_init(void)
 {
+	struct pci_controller *hose;
 	int ret;
 
 	post_code(POST_CPU_INIT);
@@ -28,6 +30,10 @@ int arch_cpu_init(void)
 	if (ret)
 		return ret;
 
+	ret = pci_early_init_hose(&hose);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
diff --git a/arch/x86/cpu/ivybridge/pci.c b/arch/x86/cpu/ivybridge/pci.c
new file mode 100644
index 0000000..c1ae658
--- /dev/null
+++ b/arch/x86/cpu/ivybridge/pci.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2008,2009
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <asm/pci.h>
+
+static void config_pci_bridge(struct pci_controller *hose, pci_dev_t dev,
+			      struct pci_config_table *table)
+{
+	u8 secondary;
+
+	hose->read_byte(hose, dev, PCI_SECONDARY_BUS, &secondary);
+	if (secondary != 0)
+		pci_hose_scan_bus(hose, secondary);
+}
+
+static struct pci_config_table pci_ivybridge_config_table[] = {
+	/* vendor, device, class, bus, dev, func */
+	{ PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI,
+		PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, &config_pci_bridge },
+	{}
+};
+
+void board_pci_setup_hose(struct pci_controller *hose)
+{
+	hose->config_table = pci_ivybridge_config_table;
+	hose->first_busno = 0;
+	hose->last_busno = 0;
+
+	/* PCI memory space */
+	pci_set_region(hose->regions + 0,
+		       CONFIG_PCI_MEM_BUS,
+		       CONFIG_PCI_MEM_PHYS,
+		       CONFIG_PCI_MEM_SIZE,
+		       PCI_REGION_MEM);
+
+	/* PCI IO space */
+	pci_set_region(hose->regions + 1,
+		       CONFIG_PCI_IO_BUS,
+		       CONFIG_PCI_IO_PHYS,
+		       CONFIG_PCI_IO_SIZE,
+		       PCI_REGION_IO);
+
+	pci_set_region(hose->regions + 2,
+		       CONFIG_PCI_PREF_BUS,
+		       CONFIG_PCI_PREF_PHYS,
+		       CONFIG_PCI_PREF_SIZE,
+		       PCI_REGION_PREFETCH);
+
+	hose->region_count = 3;
+}