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chromeos: On ARM platforms VBNV lives in the EC

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This patch renames the x86 way of doing things to
explicitly mention CMOS (which is not available on
our ARM platforms) and adds an implementation to
get VBNV through the Chrome EC. We might want to
refine this further in the future to allow VBNV
in the EC even on x86 platforms. Will be fixed when
that appears. Also, not all ARM platforms running
ChromeOS might use the Google EC in the future, in
which case this code will need additional work.

Signed-off-by: Stefan Reinauer <reinauer@google.com>

Change-Id: Ice09d0e277dbb131f9ad763e762e8877007db901
Reviewed-on: https://chromium-review.googlesource.com/167540
Reviewed-by: David Hendrix <dhendrix@chromium.org>
Tested-by: Stefan Reinauer <reinauer@google.com>
Commit-Queue: Stefan Reinauer <reinauer@google.com>
(cherry picked from commit 8df6cdbcacb082af88c069ef8b542b44ff21d97a)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6616
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
This commit is contained in:
Stefan Reinauer
2013-08-29 15:57:11 -07:00
committed by Isaac Christensen
parent b8fad3d029
commit aaaf689007
6 changed files with 181 additions and 5 deletions
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34
src/ec/google/chromeec/ec.c
View File

@ -18,6 +18,7 @@
*/
#include <stdint.h>
#include <string.h>
#include <console/console.h>
#include <bootmode.h>
#include <arch/io.h>
@ -26,7 +27,6 @@
#include <reset.h>
#include <elog.h>
#include <stdlib.h>
#include <string.h>
#include "chip.h"
#include "ec.h"
@ -154,6 +154,38 @@ u16 google_chromeec_get_board_version(void)
return board_v.board_version;
}
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len)
{
struct chromeec_command cec_cmd;
struct ec_params_vbnvcontext cmd_vbnvcontext;
struct ec_response_vbnvcontext rsp_vbnvcontext;
if (len != EC_VBNV_BLOCK_SIZE)
return -1;
cec_cmd.cmd_code = EC_CMD_VBNV_CONTEXT;
cec_cmd.cmd_version = EC_VER_VBNV_CONTEXT;
cec_cmd.cmd_data_in = &cmd_vbnvcontext;
cec_cmd.cmd_data_out = &rsp_vbnvcontext;
cec_cmd.cmd_size_in = sizeof(cmd_vbnvcontext);
cec_cmd.cmd_size_out = sizeof(rsp_vbnvcontext);
cmd_vbnvcontext.op = is_read ? EC_VBNV_CONTEXT_OP_READ :
EC_VBNV_CONTEXT_OP_WRITE;
if (!is_read)
memcpy(&cmd_vbnvcontext.block, data, EC_VBNV_BLOCK_SIZE);
google_chromeec_command(&cec_cmd);
if (is_read)
memcpy(data, &rsp_vbnvcontext.block, EC_VBNV_BLOCK_SIZE);
return cec_cmd.cmd_code;
}
#endif /* ! __SMM__ */
#ifndef __PRE_RAM__

1
src/ec/google/chromeec/ec.h
View File

@ -46,6 +46,7 @@ u32 google_chromeec_get_events_b(void);
int google_chromeec_kbbacklight(int percent);
void google_chromeec_post(u8 postcode);
void google_chromeec_log_events(u32 mask);
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len);
enum usb_charge_mode {
USB_CHARGE_MODE_DISABLED,