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soc/amd/picasso: Add eMMC driver strength and init kHz settings 

This allows passing in the presets to FSP.

I will set the UPD values after all the zork boards have had their
presets correctly set. This way we don't override the UPD defaults with
0s.

BUG=b:159823235
TEST=Build test

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I44951cacb1e9d788016a70283cf9688bf88a09f4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45097
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
This commit is contained in:
Raul E Rangel 2020-09-03 15:41:58 -06:00 committed by Patrick Georgi
parent 60d800537b
commit 5590d9aa75
1 changed files with 27 additions and 0 deletions
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27
src/soc/amd/picasso/chip.h
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@ -39,6 +39,13 @@ struct __packed usb2_phy_tune {
#define USB_PORT_COUNT 6
enum sd_emmc_driver_strength {
SD_EMMC_DRIVE_STRENGTH_B,
SD_EMMC_DRIVE_STRENGTH_A,
SD_EMMC_DRIVE_STRENGTH_C,
SD_EMMC_DRIVE_STRENGTH_D,
};
struct soc_amd_picasso_config {
struct soc_amd_common_config common_config;
/*
@ -162,6 +169,26 @@ struct soc_amd_picasso_config {
SD_EMMC_EMMC_HS400,
SD_EMMC_EMMC_HS300,
} timing;
/*
* Sets the driver strength reflected in the SDHCI Preset Value Registers.
*
* According to the SDHCI spec:
* The host should select the weakest drive strength that meets rise /
* fall time requirement at system operating frequency.
*/
enum sd_emmc_driver_strength sdr104_hs400_driver_strength;
enum sd_emmc_driver_strength ddr50_driver_strength;
enum sd_emmc_driver_strength sdr50_driver_strength;
/*
* Sets the frequency in kHz reflected in the Initialization Preset Value
* Register.
*
* This value is used while in open-drain mode, and has a maximum value of
* 400 kHz.
*/
uint16_t init_khz_preset;
} emmc_config;
uint8_t xhci0_force_gen1;