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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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 "internal_flash.h"
#include <stdint.h>
#include <string.h>
#include "extmod/vfs.h"
#include "extmod/vfs_fat.h"
#include "py/mphal.h"
#include "py/obj.h"
#include "py/runtime.h"
#include "lib/oofatfs/ff.h"
#include "asf/sam0/drivers/nvm/nvm.h"
#include "asf/sam0/drivers/port/port.h"
#include "rgb_led_status.h"
void internal_flash_init(void) {
// Activity LED for flash writes.
#ifdef MICROPY_HW_LED_MSC
struct port_config pin_conf;
port_get_config_defaults(&pin_conf);
pin_conf.direction = PORT_PIN_DIR_OUTPUT;
port_pin_set_config(MICROPY_HW_LED_MSC, &pin_conf);
port_pin_set_output_level(MICROPY_HW_LED_MSC, false);
#endif
}
uint32_t internal_flash_get_block_size(void) {
return FILESYSTEM_BLOCK_SIZE;
}
uint32_t internal_flash_get_block_count(void) {
return INTERNAL_FLASH_PART1_START_BLOCK + INTERNAL_FLASH_PART1_NUM_BLOCKS;
}
void internal_flash_flush(void) {
}
void flash_flush(void) {
internal_flash_flush();
}
static void build_partition(uint8_t *buf, int boot, int type, uint32_t start_block, uint32_t num_blocks) {
buf[0] = boot;
if (num_blocks == 0) {
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
} else {
buf[1] = 0xff;
buf[2] = 0xff;
buf[3] = 0xff;
}
buf[4] = type;
if (num_blocks == 0) {
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
} else {
buf[5] = 0xff;
buf[6] = 0xff;
buf[7] = 0xff;
}
buf[8] = start_block;
buf[9] = start_block >> 8;
buf[10] = start_block >> 16;
buf[11] = start_block >> 24;
buf[12] = num_blocks;
buf[13] = num_blocks >> 8;
buf[14] = num_blocks >> 16;
buf[15] = num_blocks >> 24;
}
static int32_t convert_block_to_flash_addr(uint32_t block) {
if (INTERNAL_FLASH_PART1_START_BLOCK <= block && block < INTERNAL_FLASH_PART1_START_BLOCK + INTERNAL_FLASH_PART1_NUM_BLOCKS) {
// a block in partition 1
block -= INTERNAL_FLASH_PART1_START_BLOCK;
return INTERNAL_FLASH_MEM_SEG1_START_ADDR + block * FILESYSTEM_BLOCK_SIZE;
}
// bad block
return -1;
}
bool internal_flash_read_block(uint8_t *dest, uint32_t block) {
if (block == 0) {
// fake the MBR so we can decide on our own partition table
for (int i = 0; i < 446; i++) {
dest[i] = 0;
}
build_partition(dest + 446, 0, 0x01 /* FAT12 */, INTERNAL_FLASH_PART1_START_BLOCK, INTERNAL_FLASH_PART1_NUM_BLOCKS);
build_partition(dest + 462, 0, 0, 0, 0);
build_partition(dest + 478, 0, 0, 0, 0);
build_partition(dest + 494, 0, 0, 0, 0);
dest[510] = 0x55;
dest[511] = 0xaa;
return true;
} else {
// non-MBR block, get data from flash memory
int32_t src = convert_block_to_flash_addr(block);
if (src == -1) {
// bad block number
return false;
}
enum status_code error_code;
// A block is made up of multiple pages. Read each page
// sequentially.
for (int i = 0; i < FILESYSTEM_BLOCK_SIZE / NVMCTRL_PAGE_SIZE; i++) {
do
{
error_code = nvm_read_buffer(src + i * NVMCTRL_PAGE_SIZE,
dest + i * NVMCTRL_PAGE_SIZE,
NVMCTRL_PAGE_SIZE);
} while (error_code == STATUS_BUSY);
}
return true;
}
}
bool internal_flash_write_block(const uint8_t *src, uint32_t block) {
if (block == 0) {
// can't write MBR, but pretend we did
return true;
} else {
#ifdef MICROPY_HW_LED_MSC
port_pin_set_output_level(MICROPY_HW_LED_MSC, true);
#endif
temp_status_color(ACTIVE_WRITE);
// non-MBR block, copy to cache
int32_t dest = convert_block_to_flash_addr(block);
if (dest == -1) {
// bad block number
return false;
}
enum status_code error_code;
// A block is formed by two rows of flash. We must erase each row
// before we write back to it.
do
{
error_code = nvm_erase_row(dest);
} while (error_code == STATUS_BUSY);
if (error_code != STATUS_OK) {
return false;
}
do
{
error_code = nvm_erase_row(dest + NVMCTRL_ROW_SIZE);
} while (error_code == STATUS_BUSY);
if (error_code != STATUS_OK) {
return false;
}
// A block is made up of multiple pages. Write each page
// sequentially.
for (int i = 0; i < FILESYSTEM_BLOCK_SIZE / NVMCTRL_PAGE_SIZE; i++) {
do
{
error_code = nvm_write_buffer(dest + i * NVMCTRL_PAGE_SIZE,
src + i * NVMCTRL_PAGE_SIZE,
NVMCTRL_PAGE_SIZE);
} while (error_code == STATUS_BUSY);
if (error_code != STATUS_OK) {
return false;
}
}
clear_temp_status();
#ifdef MICROPY_HW_LED_MSC
port_pin_set_output_level(MICROPY_HW_LED_MSC, false);
#endif
return true;
}
}
mp_uint_t internal_flash_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
for (size_t i = 0; i < num_blocks; i++) {
if (!internal_flash_read_block(dest + i * FILESYSTEM_BLOCK_SIZE, block_num + i)) {
return 1; // error
}
}
return 0; // success
}
mp_uint_t internal_flash_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
for (size_t i = 0; i < num_blocks; i++) {
if (!internal_flash_write_block(src + i * FILESYSTEM_BLOCK_SIZE, block_num + i)) {
return 1; // error
}
}
return 0; // success
}
/******************************************************************************/
// MicroPython bindings
//
// Expose the flash as an object with the block protocol.
// there is a singleton Flash object
STATIC const mp_obj_base_t internal_flash_obj = {&internal_flash_type};
STATIC mp_obj_t internal_flash_obj_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 0, 0, false);
// return singleton object
return (mp_obj_t)&internal_flash_obj;
}
STATIC mp_obj_t internal_flash_obj_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
mp_uint_t ret = internal_flash_read_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FILESYSTEM_BLOCK_SIZE);
return MP_OBJ_NEW_SMALL_INT(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(internal_flash_obj_readblocks_obj, internal_flash_obj_readblocks);
STATIC mp_obj_t internal_flash_obj_writeblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
mp_uint_t ret = internal_flash_write_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FILESYSTEM_BLOCK_SIZE);
return MP_OBJ_NEW_SMALL_INT(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(internal_flash_obj_writeblocks_obj, internal_flash_obj_writeblocks);
STATIC mp_obj_t internal_flash_obj_ioctl(mp_obj_t self, mp_obj_t cmd_in, mp_obj_t arg_in) {
mp_int_t cmd = mp_obj_get_int(cmd_in);
switch (cmd) {
case BP_IOCTL_INIT: internal_flash_init(); return MP_OBJ_NEW_SMALL_INT(0);
case BP_IOCTL_DEINIT: internal_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0); // TODO properly
case BP_IOCTL_SYNC: internal_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0);
case BP_IOCTL_SEC_COUNT: return MP_OBJ_NEW_SMALL_INT(internal_flash_get_block_count());
case BP_IOCTL_SEC_SIZE: return MP_OBJ_NEW_SMALL_INT(internal_flash_get_block_size());
default: return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(internal_flash_obj_ioctl_obj, internal_flash_obj_ioctl);
STATIC const mp_map_elem_t internal_flash_obj_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_readblocks), (mp_obj_t)&internal_flash_obj_readblocks_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_writeblocks), (mp_obj_t)&internal_flash_obj_writeblocks_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ioctl), (mp_obj_t)&internal_flash_obj_ioctl_obj },
};
STATIC MP_DEFINE_CONST_DICT(internal_flash_obj_locals_dict, internal_flash_obj_locals_dict_table);
const mp_obj_type_t internal_flash_type = {
{ &mp_type_type },
.name = MP_QSTR_InternalFlash,
.make_new = internal_flash_obj_make_new,
.locals_dict = (mp_obj_t)&internal_flash_obj_locals_dict,
};
void flash_init_vfs(fs_user_mount_t *vfs) {
vfs->base.type = &mp_fat_vfs_type;
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
vfs->fatfs.drv = vfs;
vfs->fatfs.part = 1; // flash filesystem lives on first partition
vfs->readblocks[0] = (mp_obj_t)&internal_flash_obj_readblocks_obj;
vfs->readblocks[1] = (mp_obj_t)&internal_flash_obj;
vfs->readblocks[2] = (mp_obj_t)internal_flash_read_blocks; // native version
vfs->writeblocks[0] = (mp_obj_t)&internal_flash_obj_writeblocks_obj;
vfs->writeblocks[1] = (mp_obj_t)&internal_flash_obj;
vfs->writeblocks[2] = (mp_obj_t)internal_flash_write_blocks; // native version
vfs->u.ioctl[0] = (mp_obj_t)&internal_flash_obj_ioctl_obj;
vfs->u.ioctl[1] = (mp_obj_t)&internal_flash_obj;
}