diff options
| author | Jonathon Hall <jonathon.hall@puri.sm> | 2023-05-01 13:42:46 -0400 |
|---|---|---|
| committer | Matt DeVillier <matt.devillier@gmail.com> | 2023-05-08 17:51:08 +0000 |
| commit | 78f8343c70551bdb8f2cc3716aed9f339a85530b (patch) | |
| tree | f99255176b959296f071e4db04585d6dbc713dae /src | |
| parent | e12b313844da92ff91dd0ff47a85c2fd0789a475 (diff) | |
drivers/pc80/rtc/mc146818rtc.c: Add Kconfig for RTC CMOS base addresses
Configure the CMOS bank I/O base addresses with
PC_CMOS_BASE_PORT_BANK* rather than hard-coding as 0x70, 0x72. The
defaults remain the same.
Change-Id: Ie44e5f5191c66f44e2df8ea0ff58a860be88bfcf
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74903
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/pc80/rtc/Kconfig | 8 | ||||
| -rw-r--r-- | src/drivers/pc80/rtc/mc146818rtc.c | 8 | ||||
| -rw-r--r-- | src/include/pc80/mc146818rtc.h | 21 |
3 files changed, 23 insertions, 14 deletions
diff --git a/src/drivers/pc80/rtc/Kconfig b/src/drivers/pc80/rtc/Kconfig index 0d064571e6..7a1c398d5c 100644 --- a/src/drivers/pc80/rtc/Kconfig +++ b/src/drivers/pc80/rtc/Kconfig @@ -9,3 +9,11 @@ config USE_PC_CMOS_ALTCENTURY depends on DRIVERS_MC146818 help May be useful for legacy OSes that assume its presence. + +config PC_CMOS_BASE_PORT_BANK0 + hex "Base port for CMOS bank 0 index/data registers" + default 0x70 + +config PC_CMOS_BASE_PORT_BANK1 + hex "Base port for CMOS bank 1 index/data registers" + default 0x72 diff --git a/src/drivers/pc80/rtc/mc146818rtc.c b/src/drivers/pc80/rtc/mc146818rtc.c index f45a3a0d21..6474ecbd1a 100644 --- a/src/drivers/pc80/rtc/mc146818rtc.c +++ b/src/drivers/pc80/rtc/mc146818rtc.c @@ -249,11 +249,11 @@ void set_boot_successful(void) { uint8_t index, byte; - index = inb(RTC_PORT(0)) & 0x80; + index = inb(RTC_PORT_BANK0(0)) & 0x80; index |= RTC_BOOT_BYTE; - outb(index, RTC_PORT(0)); + outb(index, RTC_PORT_BANK0(0)); - byte = inb(RTC_PORT(1)); + byte = inb(RTC_PORT_BANK0(1)); if (CONFIG(SKIP_MAX_REBOOT_CNT_CLEAR)) { /* @@ -269,5 +269,5 @@ void set_boot_successful(void) byte &= 0x0f; } - outb(byte, RTC_PORT(1)); + outb(byte, RTC_PORT_BANK0(1)); } diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h index 383c41fc66..78184214a3 100644 --- a/src/include/pc80/mc146818rtc.h +++ b/src/include/pc80/mc146818rtc.h @@ -6,9 +6,10 @@ #include <arch/io.h> #include <types.h> -#define RTC_BASE_PORT 0x70 +#define RTC_BASE_PORT_BANK0 (CONFIG_PC_CMOS_BASE_PORT_BANK0) +#define RTC_BASE_PORT_BANK1 (CONFIG_PC_CMOS_BASE_PORT_BANK1) -#define RTC_PORT(x) (RTC_BASE_PORT + (x)) +#define RTC_PORT_BANK0(x) (RTC_BASE_PORT_BANK0 + (x)) /* control registers - Moto names */ @@ -107,24 +108,24 @@ static inline unsigned char cmos_read(unsigned char addr) { - int offs = 0; + int port = RTC_BASE_PORT_BANK0; if (addr >= 128) { - offs = 2; + port = RTC_BASE_PORT_BANK1; addr -= 128; } - outb(addr, RTC_BASE_PORT + offs + 0); - return inb(RTC_BASE_PORT + offs + 1); + outb(addr, port + 0); + return inb(port + 1); } static inline void cmos_write_inner(unsigned char val, unsigned char addr) { - int offs = 0; + int port = RTC_BASE_PORT_BANK0; if (addr >= 128) { - offs = 2; + port = RTC_BASE_PORT_BANK1; addr -= 128; } - outb(addr, RTC_BASE_PORT + offs + 0); - outb(val, RTC_BASE_PORT + offs + 1); + outb(addr, port + 0); + outb(val, port + 1); } static inline u8 cmos_disable_rtc(void) |