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mb/google/cherry: early-init eMMC 

Some eMMCs need 80+ms for CMD1 to complete. And the payload may need to
access eMMC in the very early stage (for example, Depthcharge needs it
20ms after started) so we have to start initialization in coreboot.

BUG=b:195274787
TEST=emerge-cherry coreboot
BRANCH=cherry

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Change-Id: Idc86f9121fa4a34f09a683f7a81087c13ea3dd42
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56842
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
This commit is contained in:
Wenbin Mei 2021-08-04 10:53:27 +08:00 committed by Hung-Te Lin
parent da0acc6195
commit ca33b74acf
1 changed files with 6 additions and 0 deletions
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6
src/mainboard/google/cherry/mainboard.c
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@ -14,6 +14,7 @@
#include <soc/dptx.h>
#include <soc/gpio.h>
#include <soc/i2c.h>
#include <soc/msdc.h>
#include <soc/mt6360.h>
#include <soc/mtcmos.h>
#include <soc/regulator.h>
@ -39,6 +40,9 @@ DEFINE_BITFIELD(MSDC1_GPIO_MODE1_1, 6, 4)
DEFINE_BITFIELD(MSDC1_GPIO_MODE1_2, 10, 8)
DEFINE_BITFIELD(MSDC1_GPIO_MODE1_3, 14, 12)
#define MSDC0_BASE 0x11230000
#define MSDC0_TOP_BASE 0x11f50000
#define MSDC0_DRV_VALUE 0x1b6db6db
#define MSDC1_DRV_VALUE 0x1b6db
#define MSDC1_GPIO_MODE0_VALUE 0x1
@ -85,6 +89,8 @@ static void configure_emmc(void)
/* set eMMC cmd/dat/clk/ds/rstb pins driving to 8mA */
SET32_BITFIELDS(gpio_base, MSDC0_DRV, MSDC0_DRV_VALUE);
mtk_emmc_early_init((void *)MSDC0_BASE, (void *)MSDC0_TOP_BASE);
}
static void configure_sdcard(void)