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-rw-r--r--controller/fw/spi_flash.c189
1 files changed, 0 insertions, 189 deletions
diff --git a/controller/fw/spi_flash.c b/controller/fw/spi_flash.c
deleted file mode 100644
index 98c773f..0000000
--- a/controller/fw/spi_flash.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/* Library for SPI flash 25* devices.
- * Copyright (c) 2014 Multi-Tech Systems
- * Copyright (c) 2020 Jan Goette <ma@jaseg.de>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include "spi_flash.h"
-#include <libopencm3/stm32/spi.h>
-
-enum {
- WRITE_ENABLE = 0x06,
- WRITE_DISABLE = 0x04,
- READ_IDENTIFICATION = 0x9F,
- READ_STATUS = 0x05,
- WRITE_STATUS = 0x01,
- READ_DATA = 0x03,
- READ_DATA_FAST = 0x0B,
- PAGE_PROGRAM = 0x02,
- SECTOR_ERASE = 0xD8,
- BULK_ERASE = 0xC7,
- DEEP_POWER_DOWN = 0xB9,
- DEEP_POWER_DOWN_RELEASE = 0xAB,
-};
-
-enum {
- STATUS_SRWD = 0x80, // 0b 1000 0000
- STATUS_BP2 = 0x10, // 0b 0001 0000
- STATUS_BP1 = 0x08, // 0b 0000 1000
- STATUS_BP0 = 0x04, // 0b 0000 0100
- STATUS_WEL = 0x02, // 0b 0000 0010
- STATUS_WIP = 0x01, // 0b 0000 0001
-};
-
-
-static void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const char* data);
-static uint8_t spif_read_status(struct spi_flash_if *spif);
-static void spif_enable_write(struct spi_flash_if *spif);
-static void spif_wait_for_write(struct spi_flash_if *spif);
-
-#define low_byte(x) (x&0xff)
-#define mid_byte(x) ((x>>8)&0xff)
-#define high_byte(x) ((x>>16)&0xff)
-
-
-void spif_init(struct spi_flash_if *spif, size_t page_size, uint32_t spi_base, void (*cs)(bool val)) {
-
- spif->spi_base = spi_base;
- spif->page_size = page_size;
- spif->cs = cs;
- spif->cs(1);
-
- spi_reset(spif->spi_base);
- spi_init_master(spif->spi_base,
- SPI_CR1_BAUDRATE_FPCLK_DIV_2,
- SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE,
- SPI_CR1_CPHA_CLK_TRANSITION_2,
- SPI_CR1_DFF_8BIT,
- SPI_CR1_MSBFIRST);
-
- spi_enable_software_slave_management(spif->spi_base);
- spi_set_nss_high(spif->spi_base);
-
- spi_enable(spif->spi_base);
-
- spif->cs(0);
- spi_send(spif->spi_base, READ_IDENTIFICATION);
- spif->id.mfg_id = spi_xfer(spif->spi_base, 0);
- spif->id.type = spi_xfer(spif->spi_base, 0);
- spif->id.size = 1<<spi_xfer(spif->spi_base, 0);
- spif->cs(1);
-}
-
-void spif_read(struct spi_flash_if *spif, size_t addr, size_t len, char* data) {
- spif_enable_write(spif);
-
- spif->cs(0);
- spi_xfer(spif->spi_base, READ_DATA);
- spi_xfer(spif->spi_base, high_byte(addr));
- spi_xfer(spif->spi_base, mid_byte(addr));
- spi_xfer(spif->spi_base, low_byte(addr));
-
- for (size_t i = 0; i < len; i++)
- data[i] = spi_xfer(spif->spi_base, 0);
-
- spif->cs(1);
-}
-
-void spif_write(struct spi_flash_if *spif, size_t addr, size_t len, const char* data) {
- size_t written = 0, write_size = 0;
-
- while (written < len) {
- write_size = spif->page_size - ((addr + written) % spif->page_size);
- if (written + write_size > len)
- write_size = len - written;
-
- spif_write_page(spif, addr + written, write_size, data + written);
- written += write_size;
- }
-}
-
-static uint8_t spif_read_status(struct spi_flash_if *spif) {
- spif->cs(0);
- spi_xfer(spif->spi_base, READ_STATUS);
- uint8_t status = spi_xfer(spif->spi_base, 0);
- spif->cs(1);
-
- return status;
-}
-
-void spif_clear_sector(struct spi_flash_if *spif, size_t addr) {
- spif_enable_write(spif);
-
- spif->cs(0);
- spi_xfer(spif->spi_base, SECTOR_ERASE);
- spi_xfer(spif->spi_base, high_byte(addr));
- spi_xfer(spif->spi_base, mid_byte(addr));
- spi_xfer(spif->spi_base, low_byte(addr));
- spif->cs(1);
-
- spif_wait_for_write(spif);
-}
-
-void spif_clear_mem(struct spi_flash_if *spif) {
- spif_enable_write(spif);
-
- spif->cs(0);
- spi_xfer(spif->spi_base, BULK_ERASE);
- spif->cs(1);
-
- spif_wait_for_write(spif);
-}
-
-static void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const char* data) {
- spif_enable_write(spif);
-
- spif->cs(0);
- spi_xfer(spif->spi_base, PAGE_PROGRAM);
- spi_xfer(spif->spi_base, high_byte(addr));
- spi_xfer(spif->spi_base, mid_byte(addr));
- spi_xfer(spif->spi_base, low_byte(addr));
-
- for (size_t i = 0; i < len; i++) {
- spi_xfer(spif->spi_base, data[i]);
- }
-
- spif->cs(1);
- spif_wait_for_write(spif);
-}
-
-static void spif_enable_write(struct spi_flash_if *spif) {
- spif->cs(0);
- spi_xfer(spif->spi_base, WRITE_ENABLE);
- spif->cs(1);
-}
-
-static void spif_wait_for_write(struct spi_flash_if *spif) {
- while (spif_read_status(spif) & STATUS_WIP)
- for (int i = 0; i < 800; i++)
- ;
-}
-
-void spif_deep_power_down(struct spi_flash_if *spif) {
- spif->cs(0);
- spi_xfer(spif->spi_base, DEEP_POWER_DOWN);
- spif->cs(1);
-}
-
-void spif_wakeup(struct spi_flash_if *spif) {
- spif->cs(0);
- spi_xfer(spif->spi_base, DEEP_POWER_DOWN_RELEASE);
- spif->cs(1);
-}
generated by cgit (git 2.34.1) at 2024-09-21 15:37:39 +0000