Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3476
-gerrit
commit d3d0fa7fd2c0c1e3d6518d7e2a1b5953a220c2cb Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Sat Jul 6 11:41:21 2013 +0300
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 --- src/include/cbmem.h | 1 + src/lib/cbmem_info.c | 1 + src/lib/usbdebug.c | 36 ++++++++++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+)
diff --git a/src/include/cbmem.h b/src/include/cbmem.h index 982a6d8..b241d34 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 65be67c..a60761f 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 4ac7762..81e78c6 100644 --- a/src/lib/usbdebug.c +++ b/src/lib/usbdebug.c @@ -25,6 +25,7 @@ #include <arch/byteorder.h> #include <cpu/x86/car.h> #include <string.h> +#include <cbmem.h>
#include <usb_ch9.h> #include <ehci.h> @@ -737,6 +738,37 @@ void pci_ehci_read_resources(struct device *dev)
pci_dev_read_resources(dev); } + +#if CONFIG_CAR_MIGRATION +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; +} +#endif +#endif + +#if CONFIG_CAR_MIGRATION && 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
int dbgp_ep_is_active(struct dbgp_pipe *pipe) @@ -758,6 +790,10 @@ 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(CONFIG_USBDEBUG_DEFAULT_PORT); #endif