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authorSimon Glass <sjg@chromium.org>2015-11-29 13:17:49 -0700
committerSimon Glass <sjg@chromium.org>2016-01-12 10:19:09 -0700
commit5e23b8b4a4a63178015432a94617d937d8eb42cd (patch)
tree1285b0a143961b630bb27338bbe8f8f84a59a23c /drivers/pci
parentf3f1faefcc25c7cce2babe944aa39178b498cd7f (diff)
dm: pci: Use driver model PCI API in auto-config
At present we are using legacy functions even in the auto-configuration code used by driver model. Add a new pci_auto.c version which uses the correct API. Create a new pci_internal.h header to hold functions that are used within the PCI subsystem, but are not exported to other drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/Makefile6
-rw-r--r--drivers/pci/pci-uclass.c19
-rw-r--r--drivers/pci/pci_auto.c386
-rw-r--r--drivers/pci/pci_auto_old.c45
-rw-r--r--drivers/pci/pci_internal.h50
5 files changed, 444 insertions, 62 deletions
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 6b761b453d9..62232fcfb6c 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -6,15 +6,15 @@
#
ifneq ($(CONFIG_DM_PCI),)
-obj-$(CONFIG_PCI) += pci-uclass.o
+obj-$(CONFIG_PCI) += pci-uclass.o pci_auto.o
obj-$(CONFIG_DM_PCI_COMPAT) += pci_compat.o
obj-$(CONFIG_PCI_SANDBOX) += pci_sandbox.o
obj-$(CONFIG_SANDBOX) += pci-emul-uclass.o
obj-$(CONFIG_X86) += pci_x86.o
else
-obj-$(CONFIG_PCI) += pci.o
+obj-$(CONFIG_PCI) += pci.o pci_auto_old.o
endif
-obj-$(CONFIG_PCI) += pci_auto_common.o pci_auto_old.o pci_common.o pci_rom.o
+obj-$(CONFIG_PCI) += pci_auto_common.o pci_common.o pci_rom.o
obj-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
obj-$(CONFIG_PCI_INDIRECT_BRIDGE) += pci_indirect.o
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 28280553dad..792d9cbeebf 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -17,6 +17,7 @@
#if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
#include <asm/fsp/fsp_support.h>
#endif
+#include "pci_internal.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -404,7 +405,7 @@ int pci_auto_config_devices(struct udevice *bus)
int ret;
debug("%s: device %s\n", __func__, dev->name);
- ret = pciauto_config_device(hose, dm_pci_get_bdf(dev));
+ ret = dm_pciauto_config_device(dev);
if (ret < 0)
return ret;
max_bus = ret;
@@ -419,26 +420,16 @@ int pci_auto_config_devices(struct udevice *bus)
return sub_bus;
}
-int dm_pci_hose_probe_bus(struct pci_controller *hose, pci_dev_t bdf)
+int dm_pci_hose_probe_bus(struct udevice *bus)
{
- struct udevice *parent, *bus;
int sub_bus;
int ret;
debug("%s\n", __func__);
- parent = hose->bus;
-
- /* Find the bus within the parent */
- ret = pci_bus_find_devfn(parent, PCI_MASK_BUS(bdf), &bus);
- if (ret) {
- debug("%s: Cannot find device %x on bus %s: %d\n", __func__,
- bdf, parent->name, ret);
- return ret;
- }
sub_bus = pci_get_bus_max() + 1;
debug("%s: bus = %d/%s\n", __func__, sub_bus, bus->name);
- pciauto_prescan_setup_bridge(hose, bdf, sub_bus);
+ dm_pciauto_prescan_setup_bridge(bus, sub_bus);
ret = device_probe(bus);
if (ret) {
@@ -452,7 +443,7 @@ int dm_pci_hose_probe_bus(struct pci_controller *hose, pci_dev_t bdf)
return -EPIPE;
}
sub_bus = pci_get_bus_max();
- pciauto_postscan_setup_bridge(hose, bdf, sub_bus);
+ dm_pciauto_postscan_setup_bridge(bus, sub_bus);
return sub_bus;
}
diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
new file mode 100644
index 00000000000..842eafc4f8f
--- /dev/null
+++ b/drivers/pci/pci_auto.c
@@ -0,0 +1,386 @@
+/*
+ * PCI autoconfiguration library
+ *
+ * Author: Matt Porter <mporter@mvista.com>
+ *
+ * Copyright 2000 MontaVista Software Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <pci.h>
+
+/* the user can define CONFIG_SYS_PCI_CACHE_LINE_SIZE to avoid problems */
+#ifndef CONFIG_SYS_PCI_CACHE_LINE_SIZE
+#define CONFIG_SYS_PCI_CACHE_LINE_SIZE 8
+#endif
+
+void dm_pciauto_setup_device(struct udevice *dev, int bars_num,
+ struct pci_region *mem,
+ struct pci_region *prefetch, struct pci_region *io,
+ bool enum_only)
+{
+ u32 bar_response;
+ pci_size_t bar_size;
+ u16 cmdstat = 0;
+ int bar, bar_nr = 0;
+ u8 header_type;
+ int rom_addr;
+ pci_addr_t bar_value;
+ struct pci_region *bar_res;
+ int found_mem64 = 0;
+ u16 class;
+
+ dm_pci_read_config16(dev, PCI_COMMAND, &cmdstat);
+ cmdstat = (cmdstat & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) |
+ PCI_COMMAND_MASTER;
+
+ for (bar = PCI_BASE_ADDRESS_0;
+ bar < PCI_BASE_ADDRESS_0 + (bars_num * 4); bar += 4) {
+ /* Tickle the BAR and get the response */
+ if (!enum_only)
+ dm_pci_write_config32(dev, bar, 0xffffffff);
+ dm_pci_read_config32(dev, bar, &bar_response);
+
+ /* If BAR is not implemented go to the next BAR */
+ if (!bar_response)
+ continue;
+
+ found_mem64 = 0;
+
+ /* Check the BAR type and set our address mask */
+ if (bar_response & PCI_BASE_ADDRESS_SPACE) {
+ bar_size = ((~(bar_response & PCI_BASE_ADDRESS_IO_MASK))
+ & 0xffff) + 1;
+ if (!enum_only)
+ bar_res = io;
+
+ debug("PCI Autoconfig: BAR %d, I/O, size=0x%llx, ",
+ bar_nr, (unsigned long long)bar_size);
+ } else {
+ if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
+ PCI_BASE_ADDRESS_MEM_TYPE_64) {
+ u32 bar_response_upper;
+ u64 bar64;
+
+ if (!enum_only) {
+ dm_pci_write_config32(dev, bar + 4,
+ 0xffffffff);
+ }
+ dm_pci_read_config32(dev, bar + 4,
+ &bar_response_upper);
+
+ bar64 = ((u64)bar_response_upper << 32) |
+ bar_response;
+
+ bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK)
+ + 1;
+ if (!enum_only)
+ found_mem64 = 1;
+ } else {
+ bar_size = (u32)(~(bar_response &
+ PCI_BASE_ADDRESS_MEM_MASK) + 1);
+ }
+ if (!enum_only) {
+ if (prefetch && (bar_response &
+ PCI_BASE_ADDRESS_MEM_PREFETCH)) {
+ bar_res = prefetch;
+ } else {
+ bar_res = mem;
+ }
+ }
+
+ debug("PCI Autoconfig: BAR %d, %s, size=0x%llx, ",
+ bar_nr, bar_res == prefetch ? "Prf" : "Mem",
+ (unsigned long long)bar_size);
+ }
+
+ if (!enum_only && pciauto_region_allocate(bar_res, bar_size,
+ &bar_value) == 0) {
+ /* Write it out and update our limit */
+ dm_pci_write_config32(dev, bar, (u32)bar_value);
+
+ if (found_mem64) {
+ bar += 4;
+#ifdef CONFIG_SYS_PCI_64BIT
+ dm_pci_write_config32(dev, bar,
+ (u32)(bar_value >> 32));
+#else
+ /*
+ * If we are a 64-bit decoder then increment to
+ * the upper 32 bits of the bar and force it to
+ * locate in the lower 4GB of memory.
+ */
+ dm_pci_write_config32(dev, bar, 0x00000000);
+#endif
+ }
+ }
+
+ cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
+ PCI_COMMAND_IO : PCI_COMMAND_MEMORY;
+
+ debug("\n");
+
+ bar_nr++;
+ }
+
+ if (!enum_only) {
+ /* Configure the expansion ROM address */
+ dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type);
+ header_type &= 0x7f;
+ if (header_type != PCI_HEADER_TYPE_CARDBUS) {
+ rom_addr = (header_type == PCI_HEADER_TYPE_NORMAL) ?
+ PCI_ROM_ADDRESS : PCI_ROM_ADDRESS1;
+ dm_pci_write_config32(dev, rom_addr, 0xfffffffe);
+ dm_pci_read_config32(dev, rom_addr, &bar_response);
+ if (bar_response) {
+ bar_size = -(bar_response & ~1);
+ debug("PCI Autoconfig: ROM, size=%#x, ",
+ (unsigned int)bar_size);
+ if (pciauto_region_allocate(mem, bar_size,
+ &bar_value) == 0) {
+ dm_pci_write_config32(dev, rom_addr,
+ bar_value);
+ }
+ cmdstat |= PCI_COMMAND_MEMORY;
+ debug("\n");
+ }
+ }
+ }
+
+ /* PCI_COMMAND_IO must be set for VGA device */
+ dm_pci_read_config16(dev, PCI_CLASS_DEVICE, &class);
+ if (class == PCI_CLASS_DISPLAY_VGA)
+ cmdstat |= PCI_COMMAND_IO;
+
+ dm_pci_write_config16(dev, PCI_COMMAND, cmdstat);
+ dm_pci_write_config8(dev, PCI_CACHE_LINE_SIZE,
+ CONFIG_SYS_PCI_CACHE_LINE_SIZE);
+ dm_pci_write_config8(dev, PCI_LATENCY_TIMER, 0x80);
+}
+
+void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus)
+{
+ struct pci_region *pci_mem;
+ struct pci_region *pci_prefetch;
+ struct pci_region *pci_io;
+ u16 cmdstat, prefechable_64;
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
+
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+
+ dm_pci_read_config16(dev, PCI_COMMAND, &cmdstat);
+ dm_pci_read_config16(dev, PCI_PREF_MEMORY_BASE, &prefechable_64);
+ prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK;
+
+ /* Configure bus number registers */
+ dm_pci_write_config8(dev, PCI_PRIMARY_BUS,
+ PCI_BUS(dm_pci_get_bdf(dev)));
+ dm_pci_write_config8(dev, PCI_SECONDARY_BUS, sub_bus);
+ dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, 0xff);
+
+ if (pci_mem) {
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_mem, 0x100000);
+
+ /*
+ * Set up memory and I/O filter limits, assume 32-bit
+ * I/O space
+ */
+ dm_pci_write_config16(dev, PCI_MEMORY_BASE,
+ (pci_mem->bus_lower & 0xfff00000) >> 16);
+
+ cmdstat |= PCI_COMMAND_MEMORY;
+ }
+
+ if (pci_prefetch) {
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_prefetch, 0x100000);
+
+ /*
+ * Set up memory and I/O filter limits, assume 32-bit
+ * I/O space
+ */
+ dm_pci_write_config16(dev, PCI_PREF_MEMORY_BASE,
+ (pci_prefetch->bus_lower & 0xfff00000) >> 16);
+ if (prefechable_64 == PCI_PREF_RANGE_TYPE_64)
+#ifdef CONFIG_SYS_PCI_64BIT
+ dm_pci_write_config32(dev, PCI_PREF_BASE_UPPER32,
+ pci_prefetch->bus_lower >> 32);
+#else
+ dm_pci_write_config32(dev, PCI_PREF_BASE_UPPER32, 0x0);
+#endif
+
+ cmdstat |= PCI_COMMAND_MEMORY;
+ } else {
+ /* We don't support prefetchable memory for now, so disable */
+ dm_pci_write_config16(dev, PCI_PREF_MEMORY_BASE, 0x1000);
+ dm_pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, 0x0);
+ if (prefechable_64 == PCI_PREF_RANGE_TYPE_64) {
+ dm_pci_write_config16(dev, PCI_PREF_BASE_UPPER32, 0x0);
+ dm_pci_write_config16(dev, PCI_PREF_LIMIT_UPPER32, 0x0);
+ }
+ }
+
+ if (pci_io) {
+ /* Round I/O allocator to 4KB boundary */
+ pciauto_region_align(pci_io, 0x1000);
+
+ dm_pci_write_config8(dev, PCI_IO_BASE,
+ (pci_io->bus_lower & 0x0000f000) >> 8);
+ dm_pci_write_config16(dev, PCI_IO_BASE_UPPER16,
+ (pci_io->bus_lower & 0xffff0000) >> 16);
+
+ cmdstat |= PCI_COMMAND_IO;
+ }
+
+ /* Enable memory and I/O accesses, enable bus master */
+ dm_pci_write_config16(dev, PCI_COMMAND, cmdstat | PCI_COMMAND_MASTER);
+}
+
+void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus)
+{
+ struct pci_region *pci_mem;
+ struct pci_region *pci_prefetch;
+ struct pci_region *pci_io;
+
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
+
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+
+ /* Configure bus number registers */
+ dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus);
+
+ if (pci_mem) {
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_mem, 0x100000);
+
+ dm_pci_write_config16(dev, PCI_MEMORY_LIMIT,
+ (pci_mem->bus_lower - 1) >> 16);
+ }
+
+ if (pci_prefetch) {
+ u16 prefechable_64;
+
+ dm_pci_read_config16(dev, PCI_PREF_MEMORY_LIMIT,
+ &prefechable_64);
+ prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK;
+
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_prefetch, 0x100000);
+
+ dm_pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT,
+ (pci_prefetch->bus_lower - 1) >> 16);
+ if (prefechable_64 == PCI_PREF_RANGE_TYPE_64)
+#ifdef CONFIG_SYS_PCI_64BIT
+ dm_pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32,
+ (pci_prefetch->bus_lower - 1) >> 32);
+#else
+ dm_pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32, 0x0);
+#endif
+ }
+
+ if (pci_io) {
+ /* Round I/O allocator to 4KB boundary */
+ pciauto_region_align(pci_io, 0x1000);
+
+ dm_pci_write_config8(dev, PCI_IO_LIMIT,
+ ((pci_io->bus_lower - 1) & 0x0000f000) >> 8);
+ dm_pci_write_config16(dev, PCI_IO_LIMIT_UPPER16,
+ ((pci_io->bus_lower - 1) & 0xffff0000) >> 16);
+ }
+}
+
+/*
+ * HJF: Changed this to return int. I think this is required
+ * to get the correct result when scanning bridges
+ */
+int dm_pciauto_config_device(struct udevice *dev)
+{
+ struct pci_region *pci_mem;
+ struct pci_region *pci_prefetch;
+ struct pci_region *pci_io;
+ unsigned int sub_bus = PCI_BUS(dm_pci_get_bdf(dev));
+ unsigned short class;
+ bool enum_only = false;
+ int n;
+
+#ifdef CONFIG_PCI_ENUM_ONLY
+ enum_only = true;
+#endif
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
+
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+
+ dm_pci_read_config16(dev, PCI_CLASS_DEVICE, &class);
+
+ switch (class) {
+ case PCI_CLASS_BRIDGE_PCI:
+ debug("PCI Autoconfig: Found P2P bridge, device %d\n",
+ PCI_DEV(dm_pci_get_bdf(dev)));
+
+ dm_pciauto_setup_device(dev, 2, pci_mem, pci_prefetch, pci_io,
+ enum_only);
+
+ n = dm_pci_hose_probe_bus(dev);
+ if (n < 0)
+ return n;
+ sub_bus = (unsigned int)n;
+ break;
+
+ case PCI_CLASS_BRIDGE_CARDBUS:
+ /*
+ * just do a minimal setup of the bridge,
+ * let the OS take care of the rest
+ */
+ dm_pciauto_setup_device(dev, 0, pci_mem, pci_prefetch, pci_io,
+ enum_only);
+
+ debug("PCI Autoconfig: Found P2CardBus bridge, device %d\n",
+ PCI_DEV(dm_pci_get_bdf(dev)));
+
+ break;
+
+#if defined(CONFIG_PCIAUTO_SKIP_HOST_BRIDGE)
+ case PCI_CLASS_BRIDGE_OTHER:
+ debug("PCI Autoconfig: Skipping bridge device %d\n",
+ PCI_DEV(dm_pci_get_bdf(dev)));
+ break;
+#endif
+#if defined(CONFIG_MPC834x) && !defined(CONFIG_VME8349)
+ case PCI_CLASS_BRIDGE_OTHER:
+ /*
+ * The host/PCI bridge 1 seems broken in 8349 - it presents
+ * itself as 'PCI_CLASS_BRIDGE_OTHER' and appears as an _agent_
+ * device claiming resources io/mem/irq.. we only allow for
+ * the PIMMR window to be allocated (BAR0 - 1MB size)
+ */
+ debug("PCI Autoconfig: Broken bridge found, only minimal config\n");
+ dm_pciauto_setup_device(dev, 0, hose->pci_mem,
+ hose->pci_prefetch, hose->pci_io,
+ enum_only);
+ break;
+#endif
+
+ case PCI_CLASS_PROCESSOR_POWERPC: /* an agent or end-point */
+ debug("PCI AutoConfig: Found PowerPC device\n");
+
+ default:
+ dm_pciauto_setup_device(dev, 6, pci_mem, pci_prefetch, pci_io,
+ enum_only);
+ break;
+ }
+
+ return sub_bus;
+}
diff --git a/drivers/pci/pci_auto_old.c b/drivers/pci/pci_auto_old.c
index 1ff88b1ac14..9126f78b890 100644
--- a/drivers/pci/pci_auto_old.c
+++ b/drivers/pci/pci_auto_old.c
@@ -180,18 +180,9 @@ void pciauto_prescan_setup_bridge(struct pci_controller *hose,
struct pci_region *pci_io;
u16 cmdstat, prefechable_64;
-#ifdef CONFIG_DM_PCI
- /* The root controller has the region information */
- struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
-
- pci_mem = ctlr_hose->pci_mem;
- pci_prefetch = ctlr_hose->pci_prefetch;
- pci_io = ctlr_hose->pci_io;
-#else
pci_mem = hose->pci_mem;
pci_prefetch = hose->pci_prefetch;
pci_io = hose->pci_io;
-#endif
pci_hose_read_config_word(hose, dev, PCI_COMMAND, &cmdstat);
pci_hose_read_config_word(hose, dev, PCI_PREF_MEMORY_BASE,
@@ -199,15 +190,10 @@ void pciauto_prescan_setup_bridge(struct pci_controller *hose,
prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK;
/* Configure bus number registers */
-#ifdef CONFIG_DM_PCI
- pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS, PCI_BUS(dev));
- pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS, sub_bus);
-#else
pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS,
PCI_BUS(dev) - hose->first_busno);
pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS,
sub_bus - hose->first_busno);
-#endif
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, 0xff);
if (pci_mem) {
@@ -274,26 +260,13 @@ void pciauto_postscan_setup_bridge(struct pci_controller *hose,
struct pci_region *pci_prefetch;
struct pci_region *pci_io;
-#ifdef CONFIG_DM_PCI
- /* The root controller has the region information */
- struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
-
- pci_mem = ctlr_hose->pci_mem;
- pci_prefetch = ctlr_hose->pci_prefetch;
- pci_io = ctlr_hose->pci_io;
-#else
pci_mem = hose->pci_mem;
pci_prefetch = hose->pci_prefetch;
pci_io = hose->pci_io;
-#endif
/* Configure bus number registers */
-#ifdef CONFIG_DM_PCI
- pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, sub_bus);
-#else
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS,
sub_bus - hose->first_busno);
-#endif
if (pci_mem) {
/* Round memory allocator to 1MB boundary */
@@ -353,18 +326,9 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
unsigned short class;
int n;
-#ifdef CONFIG_DM_PCI
- /* The root controller has the region information */
- struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
-
- pci_mem = ctlr_hose->pci_mem;
- pci_prefetch = ctlr_hose->pci_prefetch;
- pci_io = ctlr_hose->pci_io;
-#else
pci_mem = hose->pci_mem;
pci_prefetch = hose->pci_prefetch;
pci_io = hose->pci_io;
-#endif
pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
@@ -376,12 +340,6 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
pciauto_setup_device(hose, dev, 2, pci_mem,
pci_prefetch, pci_io);
-#ifdef CONFIG_DM_PCI
- n = dm_pci_hose_probe_bus(hose, dev);
- if (n < 0)
- return n;
- sub_bus = (unsigned int)n;
-#else
/* Passing in current_busno allows for sibling P2P bridges */
hose->current_busno++;
pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
@@ -396,7 +354,6 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
pciauto_postscan_setup_bridge(hose, dev, sub_bus);
sub_bus = hose->current_busno;
-#endif
break;
case PCI_CLASS_BRIDGE_CARDBUS:
@@ -410,9 +367,7 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
debug("PCI Autoconfig: Found P2CardBus bridge, device %d\n",
PCI_DEV(dev));
-#ifndef CONFIG_DM_PCI
hose->current_busno++;
-#endif
break;
#if defined(CONFIG_PCIAUTO_SKIP_HOST_BRIDGE)
diff --git a/drivers/pci/pci_internal.h b/drivers/pci/pci_internal.h
new file mode 100644
index 00000000000..0867575a58f
--- /dev/null
+++ b/drivers/pci/pci_internal.h
@@ -0,0 +1,50 @@
+/*
+ * Internal PCI functions, not exported outside drivers/pci
+ *
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __pci_internal_h
+#define __pci_internal_h
+
+/**
+ * dm_pciauto_prescan_setup_bridge() - Set up a bridge for scanning
+ *
+ * This gets a bridge ready so that its downstream devices can be scanned.
+ * It sets up the bus number and memory range registers. Once the scan is
+ * completed, dm_pciauto_postscan_setup_bridge() should be called.
+ *
+ * @dev: Bridge device to be scanned
+ * @sub_bus: Bus number of the 'other side' of the bridge
+ */
+void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus);
+
+/**
+ * dm_pciauto_postscan_setup_bridge() - Finish set up of a bridge after scanning
+ *
+ * This should be called after a bus scan is complete. It adjusts the memory
+ * ranges to fit with the devices actually found on the other side (downstream)
+ * of the bridge.
+ *
+ * @dev: Bridge device that was scanned
+ * @sub_bus: Bus number of the 'other side' of the bridge
+ */
+void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus);
+
+/**
+ * dm_pciauto_config_device() - Configure a PCI device ready for use
+ *
+ * If the device is a bridge, downstream devices will be probed.
+ *
+ * @dev: Device to configure
+ * @return the maximum PCI bus number found by this device. If there are no
+ * bridges, this just returns the device's bus number. If the device is a
+ * bridge then it will return a larger number, depending on the devices on
+ * that bridge. On error, returns a -ve error number.
+ */
+int dm_pciauto_config_device(struct udevice *dev);
+
+#endif