mirror of https://github.com/ArduPilot/ardupilot
304 lines
7.6 KiB
C++
304 lines
7.6 KiB
C++
#include <AP_HAL/AP_HAL.h>
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#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <nuttx/progmem.h>
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#include <AP_BoardConfig/AP_BoardConfig.h>
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#include "Storage.h"
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using namespace PX4;
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/*
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This stores eeprom data in the PX4 MTD interface with a 4k size, and
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a in-memory buffer. This keeps the latency and devices IOs down.
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*/
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// name the storage file after the sketch so you can use the same sd
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// card for ArduCopter and ArduPlane
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#define STORAGE_DIR "/fs/microsd/APM"
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//#define SAVE_STORAGE_FILE STORAGE_DIR "/" SKETCHNAME ".sav"
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#define MTD_PARAMS_FILE "/fs/mtd"
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extern const AP_HAL::HAL& hal;
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extern "C" int mtd_main(int, char **);
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PX4Storage::PX4Storage(void) :
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_perf_storage(perf_alloc(PC_ELAPSED, "APM_storage")),
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_perf_errors(perf_alloc(PC_COUNT, "APM_storage_errors"))
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{
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}
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void PX4Storage::_storage_open(void)
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{
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if (_initialised) {
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return;
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}
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_dirty_mask.clearall();
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// load from storage backend
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#if USE_FLASH_STORAGE
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_flash_load();
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#else
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_mtd_load();
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#endif
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#ifdef SAVE_STORAGE_FILE
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fd = open(SAVE_STORAGE_FILE, O_WRONLY|O_CREAT|O_TRUNC, 0644);
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if (fd != -1) {
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write(fd, _buffer, sizeof(_buffer));
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close(fd);
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::printf("Saved storage file %s\n", SAVE_STORAGE_FILE);
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}
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#endif
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_initialised = true;
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}
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/*
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mark some lines as dirty. Note that there is no attempt to avoid
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the race condition between this code and the _timer_tick() code
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below, which both update _dirty_mask. If we lose the race then the
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result is that a line is written more than once, but it won't result
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in a line not being written.
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*/
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void PX4Storage::_mark_dirty(uint16_t loc, uint16_t length)
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{
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uint16_t end = loc + length;
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for (uint16_t line=loc>>PX4_STORAGE_LINE_SHIFT;
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line <= end>>PX4_STORAGE_LINE_SHIFT;
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line++) {
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_dirty_mask.set(line);
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}
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}
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void PX4Storage::read_block(void *dst, uint16_t loc, size_t n)
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{
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if (loc >= sizeof(_buffer)-(n-1)) {
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return;
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}
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_storage_open();
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memcpy(dst, &_buffer[loc], n);
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}
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void PX4Storage::write_block(uint16_t loc, const void *src, size_t n)
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{
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if (loc >= sizeof(_buffer)-(n-1)) {
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return;
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}
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if (memcmp(src, &_buffer[loc], n) != 0) {
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_storage_open();
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memcpy(&_buffer[loc], src, n);
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_mark_dirty(loc, n);
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}
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}
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void PX4Storage::_timer_tick(void)
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{
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if (!_initialised || _dirty_mask.empty()) {
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return;
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}
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perf_begin(_perf_storage);
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#if !USE_FLASH_STORAGE
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if (_fd == -1) {
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_fd = open(MTD_PARAMS_FILE, O_WRONLY);
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if (_fd == -1) {
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perf_end(_perf_storage);
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perf_count(_perf_errors);
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return;
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}
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}
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#endif
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// write out the first dirty line. We don't write more
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// than one to keep the latency of this call to a minimum
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uint16_t i;
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for (i=0; i<PX4_STORAGE_NUM_LINES; i++) {
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if (_dirty_mask.get(i)) {
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break;
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}
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}
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if (i == PX4_STORAGE_NUM_LINES) {
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// this shouldn't be possible
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perf_end(_perf_storage);
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perf_count(_perf_errors);
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return;
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}
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// save to storage backend
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#if USE_FLASH_STORAGE
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_flash_write(i);
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#else
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_mtd_write(i);
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#endif
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perf_end(_perf_storage);
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}
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#if !USE_FLASH_STORAGE
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void PX4Storage::bus_lock(bool lock)
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{
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#if defined (CONFIG_ARCH_BOARD_PX4FMU_V4)
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/*
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this is needed on Pixracer where the ms5611 may be on the same
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bus as FRAM, and the NuttX ramtron driver does not go via the
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PX4 spi bus abstraction. The ramtron driver relies on
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SPI_LOCK(). We need to prevent the ms5611 reads which happen in
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interrupt context from interfering with the FRAM operations. As
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the px4 spi bus abstraction just uses interrupt blocking as the
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locking mechanism we need to block interrupts here as well.
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*/
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if (lock) {
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irq_state = irqsave();
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} else {
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irqrestore(irq_state);
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}
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#endif
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}
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/*
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write one storage line. This also updates _dirty_mask.
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*/
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void PX4Storage::_mtd_write(uint16_t line)
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{
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uint16_t ofs = line * PX4_STORAGE_LINE_SIZE;
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if (lseek(_fd, ofs, SEEK_SET) != ofs) {
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return;
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}
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// mark the line clean
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_dirty_mask.clear(line);
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bus_lock(true);
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ssize_t ret = write(_fd, &_buffer[ofs], PX4_STORAGE_LINE_SIZE);
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bus_lock(false);
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if (ret != PX4_STORAGE_LINE_SIZE) {
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// write error - likely EINTR
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_dirty_mask.set(line);
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close(_fd);
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_fd = -1;
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perf_count(_perf_errors);
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}
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}
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/*
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load all data from mtd
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*/
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void PX4Storage::_mtd_load(void)
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{
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if (AP_BoardConfig::px4_start_driver(mtd_main, "mtd", "start " MTD_PARAMS_FILE)) {
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printf("mtd: started OK\n");
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if (AP_BoardConfig::px4_start_driver(mtd_main, "mtd", "readtest " MTD_PARAMS_FILE)) {
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printf("mtd: readtest OK\n");
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} else {
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AP_BoardConfig::sensor_config_error("mtd: failed readtest");
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}
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} else {
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AP_BoardConfig::sensor_config_error("mtd: failed start");
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}
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int fd = open(MTD_PARAMS_FILE, O_RDONLY);
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if (fd == -1) {
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AP_HAL::panic("Failed to open " MTD_PARAMS_FILE);
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}
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const uint16_t chunk_size = 128;
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for (uint16_t ofs=0; ofs<sizeof(_buffer); ofs += chunk_size) {
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bus_lock(true);
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ssize_t ret = read(fd, &_buffer[ofs], chunk_size);
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bus_lock(false);
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if (ret != chunk_size) {
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::printf("storage read of %u bytes at %u to %p failed - got %d errno=%d\n",
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(unsigned)sizeof(_buffer), (unsigned)ofs, &_buffer[ofs], (int)ret, (int)errno);
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AP_HAL::panic("Failed to read " MTD_PARAMS_FILE);
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}
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}
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close(fd);
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}
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#else // USE_FLASH_STORAGE
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/*
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load all data from flash
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*/
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void PX4Storage::_flash_load(void)
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{
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_flash_page = up_progmem_npages() - 2;
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if (up_progmem_pagesize(_flash_page) != 128*1024U ||
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up_progmem_pagesize(_flash_page+1) != 128*1024U) {
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AP_HAL::panic("Bad flash page sizes %u %u",
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up_progmem_pagesize(_flash_page),
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up_progmem_pagesize(_flash_page+1));
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}
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printf("Storage: Using flash pages %u and %u\n", _flash_page, _flash_page+1);
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if (!_flash.init()) {
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AP_HAL::panic("unable to init flash storage");
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}
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}
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/*
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write one storage line. This also updates _dirty_mask.
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*/
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void PX4Storage::_flash_write(uint16_t line)
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{
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if (_flash.write(line*PX4_STORAGE_LINE_SIZE, PX4_STORAGE_LINE_SIZE)) {
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// mark the line clean
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_dirty_mask.clear(line);
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} else {
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perf_count(_perf_errors);
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}
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}
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/*
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callback to write data to flash
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*/
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bool PX4Storage::_flash_write_data(uint8_t sector, uint32_t offset, const uint8_t *data, uint16_t length)
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{
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size_t base_address = up_progmem_getaddress(_flash_page+sector);
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return up_progmem_write(base_address+offset, data, length) == length;
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}
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/*
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callback to read data from flash
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*/
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bool PX4Storage::_flash_read_data(uint8_t sector, uint32_t offset, uint8_t *data, uint16_t length)
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{
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size_t base_address = up_progmem_getaddress(_flash_page+sector);
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const uint8_t *b = ((const uint8_t *)base_address)+offset;
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memcpy(data, b, length);
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return true;
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}
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/*
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callback to erase flash sector
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*/
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bool PX4Storage::_flash_erase_sector(uint8_t sector)
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{
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return up_progmem_erasepage(_flash_page+sector) > 0;
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}
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/*
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callback to check if erase is allowed
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*/
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bool PX4Storage::_flash_erase_ok(void)
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{
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// only allow erase while disarmed
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return !hal.util->get_soft_armed();
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}
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#endif // USE_FLASH_STORAGE
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#endif // CONFIG_HAL_BOARD
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