[PATCH 22/38] pci: Support autoconfig in SPL
Simon Glass
sjg at chromium.org
Thu Mar 30 23:32:11 CEST 2023
Allow PCI autoconfig to be handled in SPL, so that we can set it up
correctly for boards which need to do this before U-Boot proper. This
includes qemu-x64_64 which needs to set up the video device while in
32-bit mode.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
drivers/pci/Kconfig | 8 ++++++++
drivers/pci/pci-uclass.c | 10 +++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index ef328d26525b..165f111a4f5b 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -40,6 +40,14 @@ config PCI_PNP
help
Enable PCI memory and I/O space resource allocation and assignment.
+config SPL_PCI_PNP
+ bool "Enable Plug & Play support for PCI"
+ help
+ Enable PCI memory and I/O space resource allocation and assignment.
+ This is normally not done in SPL, but can be enabled if devices must
+ be set up in the SPL phase. Often it is enough to manually configure
+ one device, so this option can be disabled.
+
config PCI_REGION_MULTI_ENTRY
bool "Enable Multiple entries of region type MEMORY in ranges for PCI"
help
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 8d27e40338cf..632c1a63cfce 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -13,6 +13,7 @@
#include <log.h>
#include <malloc.h>
#include <pci.h>
+#include <spl.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <dm/device-internal.h>
@@ -722,6 +723,9 @@ static bool pci_need_device_pre_reloc(struct udevice *bus, uint vendor,
u32 vendev;
int index;
+ if (spl_phase() == PHASE_SPL && CONFIG_IS_ENABLED(PCI_PNP))
+ return true;
+
for (index = 0;
!dev_read_u32_index(bus, "u-boot,pci-pre-reloc", index,
&vendev);
@@ -793,7 +797,9 @@ static int pci_find_and_bind_driver(struct udevice *parent,
* space is pretty limited (ie: using Cache As RAM).
*/
if (!(gd->flags & GD_FLG_RELOC) &&
- !(drv->flags & DM_FLAG_PRE_RELOC))
+ !(drv->flags & DM_FLAG_PRE_RELOC) &&
+ (!CONFIG_IS_ENABLED(PCI_PNP) ||
+ spl_phase() != PHASE_SPL))
return log_msg_ret("pre", -EPERM);
/*
@@ -918,6 +924,8 @@ int pci_bind_bus_devices(struct udevice *bus)
}
ret = pci_find_and_bind_driver(bus, &find_id, bdf,
&dev);
+ } else {
+ debug("device: %s\n", dev->name);
}
if (ret == -EPERM)
continue;
--
2.40.0.348.gf938b09366-goog
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