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/st/io/io_mmc.c | 143 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 drivers/st/io/io_mmc.c (limited to 'drivers/st/io/io_mmc.c') diff --git a/drivers/st/io/io_mmc.c b/drivers/st/io/io_mmc.c new file mode 100644 index 0000000..2bf88e6 --- /dev/null +++ b/drivers/st/io/io_mmc.c @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2018-2021, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* SDMMC device functions */ +static int mmc_dev_open(const uintptr_t init_params, io_dev_info_t **dev_info); +static int mmc_block_open(io_dev_info_t *dev_info, const uintptr_t spec, + io_entity_t *entity); +static int mmc_dev_init(io_dev_info_t *dev_info, const uintptr_t init_params); +static int mmc_block_seek(io_entity_t *entity, int mode, + signed long long offset); +static int mmc_block_read(io_entity_t *entity, uintptr_t buffer, size_t length, + size_t *length_read); +static int mmc_block_close(io_entity_t *entity); +static int mmc_dev_close(io_dev_info_t *dev_info); +static io_type_t device_type_mmc(void); + +static signed long long seek_offset; +static size_t (*_read_blocks)(int lba, uintptr_t buf, size_t size); + +static const io_dev_connector_t mmc_dev_connector = { + .dev_open = mmc_dev_open +}; + +static const io_dev_funcs_t mmc_dev_funcs = { + .type = device_type_mmc, + .open = mmc_block_open, + .seek = mmc_block_seek, + .size = NULL, + .read = mmc_block_read, + .write = NULL, + .close = mmc_block_close, + .dev_init = mmc_dev_init, + .dev_close = mmc_dev_close, +}; + +static const io_dev_info_t mmc_dev_info = { + .funcs = &mmc_dev_funcs, + .info = 0, +}; + +/* Identify the device type as mmc device */ +static io_type_t device_type_mmc(void) +{ + return IO_TYPE_MMC; +} + +/* Open a connection to the mmc device */ +static int mmc_dev_open(const uintptr_t init_params, io_dev_info_t **dev_info) +{ + struct io_mmc_dev_spec *device_spec = + (struct io_mmc_dev_spec *)init_params; + + assert(dev_info != NULL); + *dev_info = (io_dev_info_t *)&mmc_dev_info; + + _read_blocks = !device_spec->use_boot_part ? + mmc_read_blocks : mmc_boot_part_read_blocks; + + return 0; +} + +static int mmc_dev_init(io_dev_info_t *dev_info, const uintptr_t init_params) +{ + return 0; +} + +/* Close a connection to the mmc device */ +static int mmc_dev_close(io_dev_info_t *dev_info) +{ + return 0; +} + +/* Open a file on the mmc device */ +static int mmc_block_open(io_dev_info_t *dev_info, const uintptr_t spec, + io_entity_t *entity) +{ + seek_offset = 0; + return 0; +} + +/* Seek to a particular file offset on the mmc device */ +static int mmc_block_seek(io_entity_t *entity, int mode, + signed long long offset) +{ + seek_offset = offset; + return 0; +} + +/* Read data from a file on the mmc device */ +static int mmc_block_read(io_entity_t *entity, uintptr_t buffer, + size_t length, size_t *length_read) +{ + uint8_t retries; + + for (retries = 0U; retries < 3U; retries++) { + *length_read = _read_blocks(seek_offset / MMC_BLOCK_SIZE, + buffer, length); + + if (*length_read == length) { + return 0; + } + WARN("%s: length_read = %lu (!= %lu), retry %u\n", __func__, + (unsigned long)*length_read, (unsigned long)length, + retries + 1U); + } + + return -EIO; +} + +/* Close a file on the mmc device */ +static int mmc_block_close(io_entity_t *entity) +{ + return 0; +} + +/* Register the mmc driver with the IO abstraction */ +int register_io_dev_mmc(const io_dev_connector_t **dev_con) +{ + int result; + + assert(dev_con != NULL); + + result = io_register_device(&mmc_dev_info); + if (result == 0) { + *dev_con = &mmc_dev_connector; + } + + return result; +} -- cgit v1.2.3