[coreboot-gerrit] New patch to review for coreboot: soc/intel: Add support for EHCI debug

[Duncan Laurie (dlaurie@google.com)]

Duncan Laurie (dlaurie at google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12794

-gerrit

commit 608cdd37eb99a8b48f0343519f42b00723362a3e
Author: Duncan Laurie <dlaurie at google.com>
Date:   Tue Dec 22 17:15:29 2015 -0800

    soc/intel: Add support for EHCI debug
    
    This was removed from broadwell in commit 11874 but was never added
    anywhere that could be used by broadwell.  Add it back to the
    soc/intel/common directory so EHCI debug can work again.
    
    Change-Id: Ia93825a1e21a770f6c82d0989cb97980a5c700d6
    Signed-off-by: Duncan Laurie <dlaurie at google.com>
---
 src/soc/intel/common/Makefile.inc |  3 ++
 src/soc/intel/common/usb_debug.c  | 59 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/src/soc/intel/common/Makefile.inc b/src/soc/intel/common/Makefile.inc
index a7218b7..5c69bca 100644
--- a/src/soc/intel/common/Makefile.inc
+++ b/src/soc/intel/common/Makefile.inc
@@ -15,6 +15,9 @@ ramstage-y += util.c
 ramstage-$(CONFIG_MMA) += mma.c
 ramstage-$(CONFIG_SOC_INTEL_COMMON_ACPI_WAKE_SOURCE) += acpi_wake_source.c
 
+romstage-$(CONFIG_USBDEBUG_IN_ROMSTAGE) += usb_debug.c
+ramstage-$(CONFIG_USBDEBUG) += usb_debug.c
+
 # Create and add the MRC cache to the cbfs image
 ifneq ($(CONFIG_CHROMEOS),y)
 $(obj)/mrc.cache: $(obj)/config.h
diff --git a/src/soc/intel/common/usb_debug.c b/src/soc/intel/common/usb_debug.c
new file mode 100644
index 0000000..fffebf0
--- /dev/null
+++ b/src/soc/intel/common/usb_debug.c
@@ -0,0 +1,59 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+// Use simple device model for this file even in ramstage
+#define __SIMPLE_DEVICE__
+
+#include <stdint.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/pci_ehci.h>
+#include <device/pci_def.h>
+
+pci_devfn_t pci_ehci_dbg_dev(unsigned int hcd_idx)
+{
+	u32 class;
+	pci_devfn_t dev = PCI_DEV(0, 0x1d, 0);
+
+	class = pci_read_config32(dev, PCI_CLASS_REVISION) >> 8;
+	if (class != PCI_EHCI_CLASSCODE)
+		return 0;
+
+	return dev;
+}
+
+void pci_ehci_dbg_set_port(pci_devfn_t dev, unsigned int port)
+{
+	/* Hardcoded to physical port 1 */
+}
+
+void pci_ehci_dbg_enable(pci_devfn_t dev, unsigned long base)
+{
+	u32 tmp32;
+
+	if (!dev)
+		return;
+
+	/* Set the EHCI BAR address. */
+	pci_write_config32(dev, EHCI_BAR_INDEX, base);
+
+	/* Enable access to the EHCI memory space registers. */
+	pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY);
+
+	/* Force ownership of hte Debug Port to the EHCI controller. */
+	tmp32 = read32((void *)(base + CONFIG_EHCI_DEBUG_OFFSET));
+	tmp32 |= (1 << 30);
+	write32((void *)(base + CONFIG_EHCI_DEBUG_OFFSET), tmp32);
+}