dm: x86: pci: Convert coreboot to use driver model for pci

Move coreboot-x86 over to driver model for PCI.

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

arch/x86/cpu/coreboot/pci.c

@@ -10,58 +10,27 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <errno.h>
 #include <pci.h>
+#include <asm/io.h>
 #include <asm/pci.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-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);
-	hose->last_busno = max(hose->last_busno, (int)secondary);
-	pci_hose_scan_bus(hose, secondary);
-}
-
-static struct pci_config_table pci_coreboot_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 },
-	{}
+static const struct dm_pci_ops pci_x86_ops = {
+	.read_config	= pci_x86_read_config,
+	.write_config	= pci_x86_write_config,
 };
 
-void board_pci_setup_hose(struct pci_controller *hose)
-{
-	hose->config_table = pci_coreboot_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);
-
-	pci_set_region(hose->regions + 3,
-		       0,
-		       0,
-		       gd->ram_size,
-		       PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+static const struct udevice_id pci_x86_ids[] = {
+	{ .compatible = "pci-x86" },
+	{ }
+};
 
-	hose->region_count = 4;
-}
+U_BOOT_DRIVER(pci_x86_drv) = {
+	.name		= "pci_x86",
+	.id		= UCLASS_PCI,
+	.of_match	= pci_x86_ids,
+	.ops		= &pci_x86_ops,
+};

arch/x86/dts/chromebook_link.dts

@@ -172,6 +172,13 @@
 	};
 
 	pci {
+		compatible = "intel,pci-ivybridge", "pci-x86";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		u-boot,dm-pre-reloc;
+		ranges = <0x02000000 0x0 0xe0000000 0xe0000000 0 0x10000000
+			0x42000000 0x0 0xd0000000 0xd0000000 0 0x10000000
+			0x01000000 0x0 0x1000 0x1000 0 0xefff>;
 		sata {
 			compatible = "intel,pantherpoint-ahci";
 			intel,sata-mode = "ahci";

board/google/chromebook_link/link.c

@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <cros_ec.h>
+#include <dm.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 #include <asm/pci.h>
@@ -13,6 +14,14 @@
 
 int arch_early_init_r(void)
 {
+	struct udevice *dev;
+	int ret;
+
+	/* Make sure the platform controller hub is up and running */
+	ret = uclass_get_device(UCLASS_PCH, 0, &dev);
+	if (ret)
+		return ret;
+
 	if (cros_ec_board_init())
 		return -1;
 

configs/coreboot-x86_defconfig

@@ -2,3 +2,4 @@ CONFIG_SYS_EXTRA_OPTIONS="SYS_TEXT_BASE=0x01110000"
 CONFIG_X86=y
 CONFIG_TARGET_COREBOOT=y
 CONFIG_OF_CONTROL=y
+CONFIG_DM_PCI=y

include/dm/uclass-id.h

@@ -37,6 +37,7 @@ enum uclass_id {
 	UCLASS_MOD_EXP,		/* RSA Mod Exp device */
 	UCLASS_PCI,		/* PCI bus */
 	UCLASS_PCI_GENERIC,	/* Generic PCI bus device */
+	UCLASS_PCH,		/* x86 platform controller hub */
 
 	UCLASS_COUNT,
 	UCLASS_INVALID = -1,