diff options
Diffstat (limited to 'src/soc/intel/common/block/include/intelblocks')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/early_mmc.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/early_mmc.h b/src/soc/intel/common/block/include/intelblocks/early_mmc.h new file mode 100644 index 0000000000..69be40cf27 --- /dev/null +++ b/src/soc/intel/common/block/include/intelblocks/early_mmc.h @@ -0,0 +1,80 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef SOC_INTEL_COMMON_BLOCK_EARLY_MMC_H +#define SOC_INTEL_COMMON_BLOCK_EARLY_MMC_H + +#include <stdint.h> + +/* + * Following should be defined in soc/iomap.h + * PRERAM_MMC_BASE_ADDRESS - Provide an address to setup emmc controller's + PCI BAR. + */ + +/* + * Structure for the following delay registers + * emmc_tx_data_cntl1: Tx Delay Control 1 (Tx_DATA_dly_1)-Offset 824h + * emmc_tx_data_cntl2: Tx Delay Control 2 (Tx_DATA_dly_2)-Offset 828h + * emmc_rx_cmd_data_cntl1: Rx CMD Data Delay Control 1 + * (Rx_CMD_Data_dly_1)-Offset 82Ch + * emmc_rx_cmd_data_cntl2: Rx CMD Data Path Delay Control 2 + * (Rx_CMD_Data_dly_2)-Offset 834h + * emmc_rx_strobe_cntl: Rx Strobe Delay Control + * (Rx_Strobe_Ctrl_Path)-Offset 830h + * emmc_tx_cmd_cntl: Tx CMD Delay Control (Tx_CMD_dly)-Offset 820h + */ +struct mmc_dll_params { + uint32_t emmc_tx_data_cntl1; + uint32_t emmc_tx_data_cntl2; + uint32_t emmc_rx_cmd_data_cntl1; + uint32_t emmc_rx_cmd_data_cntl2; + uint32_t emmc_rx_strobe_cntl; + uint32_t emmc_tx_cmd_cntl; +}; + +/* + * SOC specific API to get mmc min max frequencies. + * returns 0, if able to get f_min, f_max; otherwise returns -1 + */ +int soc_get_mmc_frequencies(uint32_t *f_min, uint32_t *f_max); +/* + * SOC specific API to configure mmc gpios. + * returns 0, if able to configure gpios; otherwise returns -1 + */ +int soc_configure_mmc_gpios(void); +/* + * SOC specific API to get mmc delay register settings. + * returns 0, if able to get register settings; otherwise returns -1 + */ +int soc_get_mmc_dll(struct mmc_dll_params *params); + +#if IS_ENABLED(CONFIG_SOC_INTEL_COMMON_EARLY_MMC_WAKE) +/* + * Initializes sdhci / mmc controller and sends CMD0, CMD1 to emmc card. + * In case of success: It returns 0 and adds cbmem entry CBMEM_ID_MMC_STATUS + * and sets it to 1. Payload can start by sending CMD1, there is no need to + * send CMD0 and wait for the card to be ready. + * In case of failure: It returns -1 and doesn't add cbmem entry. Payload + * should do complete initialization starting with CMD0. + */ +int early_mmc_wake_hw(void); +#else +static inline int early_mmc_wake_hw(void) +{ + return -1; +} +#endif /* CONFIG_SOC_INTEL_COMMON_EARLY_MMC_WAKE */ +#endif /* SOC_INTEL_COMMON_BLOCK_EARLY_MMC_H */ |