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drivers/pc80/mc146818rtc: Assume we always have ALTCENTURY 

This patch has a rather twisted history. It was originally split off
from a chromium patch, which moved ALTCENTURY to Kconfig. However,
since we have no user without ALTCENTURY, we've agreed that the best
way to proceed is to eliminate the non-ALTCENTURY case entirely.

The old commit message and identifiers are kept below for reference:

The availability of "ALTCENTURY" is now set through a kconfig
variable so it can be available to the RTC driver without having to have a
specialized interface.

BUG=None
TEST=Built and booted on Link with the event log code modified to use the RTC
interface. Verified that the event times were accurate.
BRANCH=nyan

Original-Change-Id: Ifa807898e583254e57167fd44932ea86627a02ee
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/197795
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>

This is the second half the following patch.
(cherry picked from commit 9e0fd75142d29afe34f6c6b9ce0099f478ca5a93)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8e871f31c3d4be7676abf9454ca90808d1ddca03
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/7987
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins)
This commit is contained in:
Gabe Black 2014-04-30 21:31:44 -07:00 committed by Marc Jones
parent 3afa03e995
commit 03abaee219
11 changed files with 24 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/drivers/pc80/mc146818rtc.c
View File

@ -32,7 +32,7 @@
#endif
static void cmos_reset_date(u8 has_century)
static void cmos_reset_date(void)
{
/* Now setup a default date equals to the build date */
struct rtc_time time = {
@ -45,7 +45,7 @@ static void cmos_reset_date(u8 has_century)
bcd2bin(coreboot_build_date.year),
.wday = bcd2bin(coreboot_build_date.weekday)
};
rtc_set(&time, has_century);
rtc_set(&time);
}
#if CONFIG_USE_OPTION_TABLE
@ -123,7 +123,7 @@ void cmos_init(int invalid)
cmos_write(0, i);
#endif
if (cmos_invalid)
cmos_reset_date(RTC_HAS_NO_ALTCENTURY);
cmos_reset_date();
printk(BIOS_WARNING, "RTC:%s%s%s%s\n",
invalid?" Clear requested":"",
@ -325,12 +325,12 @@ enum cb_err set_option(const char *name, void *value)
* hurts some OSes. Even if we don't set USE_OPTION_TABLE, we need
* to make sure the date is valid.
*/
void cmos_check_update_date(u8 has_century)
void cmos_check_update_date()
{
u8 year, century;
/* Note: Need to check if the hardware supports RTC_CLK_ALTCENTURY. */
century = has_century ? cmos_read(RTC_CLK_ALTCENTURY) : 0;
/* Assume hardware always supports RTC_CLK_ALTCENTURY. */
century = cmos_read(RTC_CLK_ALTCENTURY);
year = cmos_read(RTC_CLK_YEAR);
/*
@ -339,25 +339,23 @@ void cmos_check_update_date(u8 has_century)
* if the date is valid.
*/
if (century > 0x99 || year > 0x99) /* Invalid date */
cmos_reset_date(has_century);
cmos_reset_date();
}
int rtc_set(const struct rtc_time *time, u8 has_century)
{
int rtc_set(const struct rtc_time *time){
cmos_write(bin2bcd(time->sec), RTC_CLK_SECOND);
cmos_write(bin2bcd(time->min), RTC_CLK_MINUTE);
cmos_write(bin2bcd(time->hour), RTC_CLK_HOUR);
cmos_write(bin2bcd(time->mday), RTC_CLK_DAYOFMONTH);
cmos_write(bin2bcd(time->mon), RTC_CLK_MONTH);
cmos_write(bin2bcd(time->year % 100), RTC_CLK_YEAR);
if (has_century)
cmos_write(bin2bcd(time->year / 100),
RTC_CLK_ALTCENTURY);
/* Same assumption as above: We always have RTC_CLK_ALTCENTURY */
cmos_write(bin2bcd(time->year / 100), RTC_CLK_ALTCENTURY);
cmos_write(bin2bcd(time->wday + 1), RTC_CLK_DAYOFWEEK);
return 0;
}
int rtc_get(struct rtc_time *time, u8 has_century)
int rtc_get(struct rtc_time *time)
{
time->sec = bcd2bin(cmos_read(RTC_CLK_SECOND));
time->min = bcd2bin(cmos_read(RTC_CLK_MINUTE));
@ -365,10 +363,8 @@ int rtc_get(struct rtc_time *time, u8 has_century)
time->mday = bcd2bin(cmos_read(RTC_CLK_DAYOFMONTH));
time->mon = bcd2bin(cmos_read(RTC_CLK_MONTH));
time->year = bcd2bin(cmos_read(RTC_CLK_YEAR));
if (has_century)
time->year += bcd2bin(cmos_read(RTC_CLK_ALTCENTURY)) * 100;
else
time->year += 2000;
/* Same assumption as above: We always have RTC_CLK_ALTCENTURY */
time->year += bcd2bin(cmos_read(RTC_CLK_ALTCENTURY)) * 100;
time->wday = bcd2bin(cmos_read(RTC_CLK_DAYOFWEEK)) - 1;
return 0;
}

5
src/include/pc80/mc146818rtc.h
View File

@ -94,9 +94,6 @@
#define RTC_CLK_YEAR 9
#define RTC_CLK_ALTCENTURY 0x32
#define RTC_HAS_ALTCENTURY 1
#define RTC_HAS_NO_ALTCENTURY 0
/* On PCs, the checksum is built only over bytes 16..45 */
#define PC_CKS_RANGE_START 16
#define PC_CKS_RANGE_END 45
@ -173,7 +170,7 @@ static inline void cmos_write32(u8 offset, u32 value)
#if !defined(__ROMCC__)
void cmos_init(int invalid);
void cmos_check_update_date(u8 has_century);
void cmos_check_update_date(void);
#if CONFIG_USE_OPTION_TABLE
enum cb_err set_option(const char *name, void *val);
enum cb_err get_option(void *dest, const char *name);

4
src/include/rtc.h
View File

@ -31,7 +31,7 @@ struct rtc_time
int wday;
};
int rtc_set(const struct rtc_time *time, u8 has_century);
int rtc_get(struct rtc_time *time, u8 has_century);
int rtc_set(const struct rtc_time *time);
int rtc_get(struct rtc_time *time);
#endif /* _RTC_H_ */

2
src/southbridge/amd/agesa/hudson/lpc.c
View File

@ -71,7 +71,7 @@ static void lpc_init(device_t dev)
byte |= 1 << 0 | 1 << 3;
pci_write_config8(dev, 0xBB, byte);
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
/* Initialize the real time clock.
* The 0 argument tells cmos_init not to

2
src/southbridge/amd/cimx/sb700/late.c
View File

@ -81,7 +81,7 @@ static void lpc_init(device_t dev)
{
printk(BIOS_DEBUG, "SB700 - Late.c - lpc_init - Start.\n");
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
/* Initialize the real time clock.
* The 0 argument tells cmos_init not to

2
src/southbridge/amd/cimx/sb800/late.c
View File

@ -132,7 +132,7 @@ static void lpc_init(device_t dev)
{
printk(BIOS_DEBUG, "SB800 - Late.c - lpc_init - Start.\n");
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
/* Initialize the real time clock.
* The 0 argument tells cmos_init not to

2
src/southbridge/amd/cimx/sb900/late.c
View File

@ -103,7 +103,7 @@ static void lpc_init(device_t dev)
printk(BIOS_DEBUG, "SB900 - Late.c - lpc_init - Start.\n");
/* SB Configure HPET base and enable bit */
//- hpetInit(sb_config, &(sb_config->BuildParameters));
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
/* Initialize the real time clock.
* The 0 argument tells cmos_init not to

2
src/southbridge/amd/pi/avalon/lpc.c
View File

@ -70,7 +70,7 @@ static void lpc_init(device_t dev)
byte |= 1 << 0 | 1 << 3;
pci_write_config8(dev, 0xBB, byte);
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
/* Initialize the real time clock.
* The 0 argument tells cmos_init not to

2
src/southbridge/amd/sb600/lpc.c
View File

@ -63,7 +63,7 @@ static void lpc_init(device_t dev)
byte &= ~(1 << 1);
pci_write_config8(dev, 0x78, byte);
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
}
static void sb600_lpc_read_resources(device_t dev)

2
src/southbridge/amd/sb700/lpc.c
View File

@ -90,7 +90,7 @@ static void lpc_init(device_t dev)
}
#endif
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
}
void backup_top_of_ram(uint64_t ramtop)

2
src/southbridge/amd/sb800/lpc.c
View File

@ -74,7 +74,7 @@ static void lpc_init(device_t dev)
byte |= 1 << 0 | 1 << 3;
pci_write_config8(dev, 0xBB, byte);
cmos_check_update_date(RTC_HAS_ALTCENTURY);
cmos_check_update_date();
}
static void sb800_lpc_read_resources(device_t dev)