kopia lustrzana https://github.com/espressif/esp-idf
36 wiersze
1.5 KiB
C
36 wiersze
1.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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// We keep this file here only for future use
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#include "sdkconfig.h"
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#include "soc/spi_periph.h"
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#include "esp32s3/rom/spi_flash.h"
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#include "esp32s3/rom/opi_flash.h"
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extern void esp_rom_spi_set_address_bit_len(int spi, int addr_bits);
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void esp_rom_opiflash_cache_mode_config(esp_rom_spiflash_read_mode_t mode, const esp_rom_opiflash_spi0rd_t *cache)
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{
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esp_rom_spi_set_op_mode(0, mode);
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REG_CLR_BIT(SPI_MEM_USER_REG(0), SPI_MEM_USR_MOSI);
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REG_SET_BIT(SPI_MEM_USER_REG(0), SPI_MEM_USR_MISO | SPI_MEM_USR_ADDR);
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if (cache) {
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esp_rom_spi_set_address_bit_len(0, cache->addr_bit_len);
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// Patch for ROM function `esp_rom_opiflash_cache_mode_config`, because when dummy is 0,
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// `SPI_MEM_USR_DUMMY` should be 0. `esp_rom_opiflash_cache_mode_config` doesn't handle this
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// properly.
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if (cache->dummy_bit_len == 0) {
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REG_CLR_BIT(SPI_MEM_USER_REG(0), SPI_MEM_USR_DUMMY);
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} else {
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REG_SET_BIT(SPI_MEM_USER_REG(0), SPI_MEM_USR_DUMMY);
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REG_SET_FIELD(SPI_MEM_USER1_REG(0), SPI_MEM_USR_DUMMY_CYCLELEN, cache->dummy_bit_len - 1 + rom_spiflash_legacy_data->dummy_len_plus[0]);
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}
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REG_SET_FIELD(SPI_MEM_USER2_REG(0), SPI_MEM_USR_COMMAND_VALUE, cache->cmd);
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REG_SET_FIELD(SPI_MEM_USER2_REG(0), SPI_MEM_USR_COMMAND_BITLEN, cache->cmd_bit_len - 1);
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REG_SET_FIELD(SPI_MEM_DDR_REG(0), SPI_MEM_SPI_FMEM_VAR_DUMMY, cache->var_dummy_en);
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}
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}
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