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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>
This commit is contained in:
Kyösti Mälkki 2013-07-06 11:41:21 +03:00
parent e53cece07b
commit 690bf2f333
3 changed files with 39 additions and 0 deletions
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1
src/include/cbmem.h
View File

@ -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

1
src/lib/cbmem_info.c
View File

@ -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)

37
src/lib/usbdebug.c
View File

@ -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