124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "rom_fs.h"
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#include "asf/common/services/usb/class/msc/device/udi_msc.h"
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#include "storage.h"
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//! This function tests memory state, and starts memory initialization
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//! @return Ctrl_status
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//! It is ready -> CTRL_GOOD
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//! Memory unplug -> CTRL_NO_PRESENT
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//! Not initialized or changed -> CTRL_BUSY
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//! An error occurred -> CTRL_FAIL
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Ctrl_status rom_fs_test_unit_ready(void)
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{
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return CTRL_GOOD;
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}
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//! This function returns the address of the last valid sector
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//! @param uint32_t_nb_sector Pointer to number of sectors (sector=512 bytes)
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//! @return Ctrl_status
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//! It is ready -> CTRL_GOOD
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//! Memory unplug -> CTRL_NO_PRESENT
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//! Not initialized or changed -> CTRL_BUSY
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//! An error occurred -> CTRL_FAIL
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Ctrl_status rom_fs_read_capacity(uint32_t *uint32_t_nb_sector)
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{
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*uint32_t_nb_sector = storage_get_block_count();
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return CTRL_GOOD;
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}
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//! This function returns the write-protected mode
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//!
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//! @return true if the memory is protected
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//!
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bool rom_fs_wr_protect(void)
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{
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return false;
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}
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//! This function informs about the memory type
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//!
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//! @return true if the memory is removable
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//!
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bool rom_fs_removal(void)
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{
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return true;
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}
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// TODO(tannewt): Transfer more than a single sector at a time if we need more
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// speed.
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//! This function transfers the memory data to the USB MSC interface
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//!
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//! @param addr Sector address to start read
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//! @param nb_sector Number of sectors to transfer (sector=512 bytes)
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//!
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//! @return Ctrl_status
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//! It is ready -> CTRL_GOOD
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//! Memory unplug -> CTRL_NO_PRESENT
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//! Not initialized or changed -> CTRL_BUSY
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//! An error occurred -> CTRL_FAIL
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//!
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Ctrl_status rom_fs_usb_read_10(uint32_t addr, volatile uint16_t nb_sector)
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{
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uint8_t sector_buffer[FLASH_BLOCK_SIZE];
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for (uint16_t sector = 0; sector < nb_sector; sector++) {
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storage_read_block(sector_buffer, addr + sector);
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if (!udi_msc_trans_block(true, sector_buffer, FLASH_BLOCK_SIZE, NULL)) {
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return CTRL_FAIL; // transfer aborted
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}
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}
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return CTRL_GOOD;
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}
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//! This function transfers the USB MSC data to the memory
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//!
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//! @param addr Sector address to start write
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//! @param nb_sector Number of sectors to transfer (sector=512 bytes)
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//!
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//! @return Ctrl_status
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//! It is ready -> CTRL_GOOD
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//! Memory unplug -> CTRL_NO_PRESENT
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//! Not initialized or changed -> CTRL_BUSY
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//! An error occurred -> CTRL_FAIL
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//!
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Ctrl_status rom_fs_usb_write_10(uint32_t addr, uint16_t nb_sector)
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{
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uint8_t sector_buffer[FLASH_BLOCK_SIZE];
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for (uint16_t sector = 0; sector < nb_sector; sector++) {
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if (!udi_msc_trans_block(false, sector_buffer, FLASH_BLOCK_SIZE, NULL)) {
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return CTRL_FAIL; // transfer aborted
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}
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if (!storage_write_block(sector_buffer, addr + sector)) {
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return CTRL_FAIL;
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}
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}
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return CTRL_GOOD;
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}
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