From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:13:47 +0200 Subject: Adding upstream version 2.8.0+dfsg. Signed-off-by: Daniel Baumann --- drivers/renesas/common/emmc/emmc_init.c | 163 ++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 drivers/renesas/common/emmc/emmc_init.c (limited to 'drivers/renesas/common/emmc/emmc_init.c') diff --git a/drivers/renesas/common/emmc/emmc_init.c b/drivers/renesas/common/emmc/emmc_init.c new file mode 100644 index 0000000..c0ec600 --- /dev/null +++ b/drivers/renesas/common/emmc/emmc_init.c @@ -0,0 +1,163 @@ +/* + * Copyright (c) 2015-2021, Renesas Electronics Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include + +#include + +#include "emmc_config.h" +#include "emmc_hal.h" +#include "emmc_std.h" +#include "emmc_registers.h" +#include "emmc_def.h" +#include "rcar_private.h" +#include "cpg_registers.h" + +st_mmc_base mmc_drv_obj; + +EMMC_ERROR_CODE rcar_emmc_memcard_power(uint8_t mode) +{ + + if (mode == TRUE) { + /* power on (Vcc&Vccq is always power on) */ + mmc_drv_obj.card_power_enable = TRUE; + } else { + /* power off (Vcc&Vccq is always power on) */ + mmc_drv_obj.card_power_enable = FALSE; + mmc_drv_obj.mount = FALSE; + mmc_drv_obj.selected = FALSE; + } + + return EMMC_SUCCESS; +} +static inline void emmc_set_retry_count(uint32_t retry) +{ + mmc_drv_obj.retries_after_fail = retry; +} + +static inline void emmc_set_data_timeout(uint32_t data_timeout) +{ + mmc_drv_obj.data_timeout = data_timeout; +} + +static void emmc_memset(uint8_t *buff, uint8_t data, uint32_t cnt) +{ + if (buff == NULL) { + return; + } + + while (cnt > 0) { + *buff++ = data; + cnt--; + } +} + +static void emmc_driver_config(void) +{ + emmc_set_retry_count(EMMC_RETRY_COUNT); + emmc_set_data_timeout(EMMC_RW_DATA_TIMEOUT); +} + +static void emmc_drv_init(void) +{ + emmc_memset((uint8_t *) (&mmc_drv_obj), 0, sizeof(st_mmc_base)); + mmc_drv_obj.card_present = HAL_MEMCARD_CARD_IS_IN; + mmc_drv_obj.data_timeout = EMMC_RW_DATA_TIMEOUT; + mmc_drv_obj.bus_width = HAL_MEMCARD_DATA_WIDTH_1_BIT; +} + +static EMMC_ERROR_CODE emmc_dev_finalize(void) +{ + EMMC_ERROR_CODE result; + uint32_t dataL; + + /* + * MMC power off + * the power supply of eMMC device is always turning on. + * RST_n : Hi --> Low level. + */ + result = rcar_emmc_memcard_power(FALSE); + + /* host controller reset */ + SETR_32(SD_INFO1, 0x00000000U); /* all interrupt clear */ + SETR_32(SD_INFO2, SD_INFO2_CLEAR); /* all interrupt clear */ + SETR_32(SD_INFO1_MASK, 0x00000000U); /* all interrupt disable */ + SETR_32(SD_INFO2_MASK, SD_INFO2_CLEAR); /* all interrupt disable */ + SETR_32(SD_CLK_CTRL, 0x00000000U); /* MMC clock stop */ + + dataL = mmio_read_32(SMSTPCR3); + if ((dataL & CPG_MSTP_MMC) == 0U) { + dataL |= (CPG_MSTP_MMC); + mmio_write_32(CPG_CPGWPR, (~dataL)); + mmio_write_32(SMSTPCR3, dataL); + } + + return result; +} + +static EMMC_ERROR_CODE emmc_dev_init(void) +{ + /* Enable clock supply to eMMC. */ + mstpcr_write(SMSTPCR3, CPG_MSTPSR3, CPG_MSTP_MMC); + + /* Set SD clock */ + mmio_write_32(CPG_CPGWPR, ~((uint32_t) (BIT9 | BIT0))); /* SD phy 200MHz */ + + /* Stop SDnH clock & SDn=200MHz */ + mmio_write_32(CPG_SDxCKCR, (BIT9 | BIT0)); + + /* MMCIF initialize */ + SETR_32(SD_INFO1, 0x00000000U); /* all interrupt clear */ + SETR_32(SD_INFO2, SD_INFO2_CLEAR); /* all interrupt clear */ + SETR_32(SD_INFO1_MASK, 0x00000000U); /* all interrupt disable */ + SETR_32(SD_INFO2_MASK, SD_INFO2_CLEAR); /* all interrupt disable */ + + SETR_32(HOST_MODE, 0x00000000U); /* SD_BUF access width = 64-bit */ + SETR_32(SD_OPTION, 0x0000C0EEU); /* Bus width = 1bit, timeout=MAX */ + SETR_32(SD_CLK_CTRL, 0x00000000U); /* Disable Automatic Control & Clock Output */ + + return EMMC_SUCCESS; +} + +static EMMC_ERROR_CODE emmc_reset_controller(void) +{ + EMMC_ERROR_CODE result; + + /* initialize mmc driver */ + emmc_drv_init(); + + /* initialize H/W */ + result = emmc_dev_init(); + if (result == EMMC_SUCCESS) { + mmc_drv_obj.initialize = TRUE; + } + + return result; + +} + +EMMC_ERROR_CODE emmc_terminate(void) +{ + EMMC_ERROR_CODE result; + + result = emmc_dev_finalize(); + + emmc_memset((uint8_t *) (&mmc_drv_obj), 0, sizeof(st_mmc_base)); + + return result; +} + +EMMC_ERROR_CODE rcar_emmc_init(void) +{ + EMMC_ERROR_CODE result; + + result = emmc_reset_controller(); + if (result == EMMC_SUCCESS) { + emmc_driver_config(); + } + + return result; +} -- cgit v1.2.3