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authorKyösti Mälkki <kyosti.malkki@gmail.com>2013-07-06 11:41:21 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2013-09-06 00:36:16 +0200
commit690bf2f333322e764262e60fd24802205280df5e (patch)
tree7d9cd7fdb77bb9a5f9fddc59df5f35339caaef8a
parente53cece07b14eab1912db3d18d2cb50423d996ec (diff)
usbdebug: Use CAR migration
If we already initialized EHCI controller and USB device in romstage, locate active configuration from salvaged CAR_GLOBAL and avoid doing the hardware initialisation again. Change-Id: I7cb3a359488b25abc9de49c96c0197f6563a4a2c Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/3476 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@google.com>
-rw-r--r--src/include/cbmem.h1
-rw-r--r--src/lib/cbmem_info.c1
-rw-r--r--src/lib/usbdebug.c37
3 files changed, 39 insertions, 0 deletions
diff --git a/src/include/cbmem.h b/src/include/cbmem.h
index 982a6d83d4..b241d34067 100644
--- a/src/include/cbmem.h
+++ b/src/include/cbmem.h
@@ -70,6 +70,7 @@
#define CBMEM_ID_ROOT 0xff4007ff
#define CBMEM_ID_VBOOT_HANDOFF 0x780074f0
#define CBMEM_ID_CAR_GLOBALS 0xcac4e6a3
+#define CBMEM_ID_EHCI_DEBUG 0xe4c1deb9
#define CBMEM_ID_NONE 0x00000000
#define CBMEM_ID_AGESA_RUNTIME 0x41474553
diff --git a/src/lib/cbmem_info.c b/src/lib/cbmem_info.c
index 65be67c17a..a60761f7b0 100644
--- a/src/lib/cbmem_info.c
+++ b/src/lib/cbmem_info.c
@@ -48,6 +48,7 @@ static struct cbmem_id_to_name {
{ CBMEM_ID_VBOOT_HANDOFF, "VBOOT " },
{ CBMEM_ID_CAR_GLOBALS, "CAR GLOBALS" },
{ CBMEM_ID_AGESA_RUNTIME, "AGESA RSVD " },
+ { CBMEM_ID_EHCI_DEBUG, "USBDEBUG " },
};
void cbmem_print_entry(int n, u32 id, u64 base, u64 size)
diff --git a/src/lib/usbdebug.c b/src/lib/usbdebug.c
index 3dc35f1088..7a8402dfa3 100644
--- a/src/lib/usbdebug.c
+++ b/src/lib/usbdebug.c
@@ -26,6 +26,7 @@
#include <arch/byteorder.h>
#include <cpu/x86/car.h>
#include <string.h>
+#include <cbmem.h>
#include <usb_ch9.h>
#include <ehci.h>
@@ -868,6 +869,38 @@ void pci_ehci_read_resources(struct device *dev)
}
#endif
+#if CONFIG_CAR_MIGRATION
+#if !defined(__PRE_RAM__) && !defined(__SMM__)
+static int get_usbdebug_from_cbmem(struct ehci_debug_info *info)
+{
+ struct ehci_debug_info *dbg_info_cbmem;
+
+ dbg_info_cbmem = cbmem_find(CBMEM_ID_EHCI_DEBUG);
+ if (dbg_info_cbmem == NULL)
+ return -1;
+
+ memcpy(info, dbg_info_cbmem, sizeof (*info));
+ printk(BIOS_DEBUG, "EHCI debug port found in CBMEM.\n");
+
+ return 0;
+}
+
+#elif defined(__PRE_RAM__)
+static void migrate_ehci_debug(void)
+{
+ struct ehci_debug_info *dbg_info = dbgp_ehci_info();
+ struct ehci_debug_info *dbg_info_cbmem;
+
+ dbg_info_cbmem = cbmem_add(CBMEM_ID_EHCI_DEBUG, sizeof(*dbg_info));
+ if (dbg_info_cbmem == NULL)
+ return;
+
+ memcpy(dbg_info_cbmem, dbg_info, sizeof(*dbg_info));
+}
+CAR_MIGRATE(migrate_ehci_debug);
+#endif
+#endif /* CONFIG_CAR_MIGRATION */
+
unsigned long pci_ehci_base_regs(pci_devfn_t sdev)
{
#ifdef __SIMPLE_DEVICE__
@@ -898,6 +931,10 @@ int usbdebug_init(void)
{
struct ehci_debug_info *dbg_info = dbgp_ehci_info();
+#if CONFIG_CAR_MIGRATION && !defined(__PRE_RAM__) && !defined(__SMM__)
+ if (!get_usbdebug_from_cbmem(dbg_info))
+ return 0;
+#endif
#if defined(__PRE_RAM__) || !CONFIG_EARLY_CONSOLE
enable_usbdebug();
#endif