Import of the watch repository from Pebble

platform/snowy/boot/src/drivers/flash.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+/**
+ * Configure the micro's peripherals to communicate with the flash
+ * chip.
+ */
+void flash_init(void);
+
+/**
+ * Read 1 or more bytes starting at the specified 24bit address into
+ * the provided buffer. This function does no range checking, so it is
+ * currently possible to run off the end of the flash.
+ *
+ * @param buffer A byte-buffer that will be used to store the data
+ * read from flash.
+ * @param start_addr The address of the first byte to be read from flash.
+ * @param buffer_size The total number of bytes to be read from flash.
+ */
+void flash_read_bytes(uint8_t* buffer, uint32_t start_addr, uint32_t buffer_size);
+
+//! Check if we can talk to the flash.
+//! @return trie if the CFI table can be queried.
+bool flash_sanity_check(void);