soc/intel/denverton_ns: Update UART legacy mode to keep FSP traces
The FSP can only output its traces when the HSUART PCI device is
available.
- Move the hiding to after last FSP call.
- Adapt coreboot PCI enumeration to keep the legacy configuration.
With UART configured as legacy Linux will not re-enumerate it but detects
it as legacy (ttyS0 instead of ttyS4).
Change-Id: Id8801e178ffd8eeee78ece07da7bd6b8dbd88538
Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net>
Reviewed-on: https://review.coreboot.org/23623
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/soc/intel/denverton_ns/uart.c b/src/soc/intel/denverton_ns/uart.c
index ca4e8b5..78f1d56 100644
--- a/src/soc/intel/denverton_ns/uart.c
+++ b/src/soc/intel/denverton_ns/uart.c
@@ -26,11 +26,26 @@
#include <device/pci_ids.h>
#include <soc/pci_devs.h>
#include <console/console.h>
+#include <soc/uart.h>
+#include <fsp/api.h>
static void dnv_ns_uart_read_resources(struct device *dev)
{
/* read resources to be visible in the log*/
pci_dev_read_resources(dev);
+ if (!IS_ENABLED(CONFIG_LEGACY_UART_MODE))
+ return;
+ struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0);
+ if (res == NULL)
+ return;
+ res->size = 0x8;
+ res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ /* Do not configure membar */
+ res = find_resource(dev, PCI_BASE_ADDRESS_1);
+ if (res != NULL)
+ res->flags = 0;
+ compact_resources(dev);
+
}
static struct device_operations uart_ops = {
@@ -51,3 +66,27 @@
.vendor = PCI_VENDOR_ID_INTEL,
.devices = uart_ids
};
+
+static void hide_hsuarts(void)
+{
+ int i;
+ printk(BIOS_DEBUG, "HIDING HSUARTs.\n");
+ /* There is a hardware requirement to hide functions starting from the
+ last one. */
+ for (i = DENVERTON_UARTS_TO_INI - 1; i >= 0; i--) {
+ struct device *uart_dev;
+ uart_dev = dev_find_slot(0, PCI_DEVFN(HSUART_DEV, i));
+ if (uart_dev == NULL)
+ continue;
+ pci_or_config32(uart_dev, PCI_FUNC_RDCFG_HIDE, 1);
+ }
+}
+
+/* Hide HSUART PCI device very last when FSP no longer needs it */
+void platform_fsp_notify_status(enum fsp_notify_phase phase)
+{
+ if (phase != END_OF_FIRMWARE)
+ return;
+ if (IS_ENABLED(CONFIG_LEGACY_UART_MODE))
+ hide_hsuarts();
+}