+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
- *
- * -->
- *
- * \brief Self programming routines.
- *
- * \version $Id$
- * \author Francesco Sacchi <batt@develer.com>
- * \author Daniele Basile <asterix@develer.com>
- *
- * This module implements a kfile-like access for Atmel avr
- * internal flash.
- * Internal flash writing access is controlled by BOOTSZ fuses, check
- * datasheet for details.
- */
-
-#include "flash_avr.h"
-
-#include <avr/io.h>
-#include <avr/boot.h>
-#include <avr/pgmspace.h>
-
-#include <cfg/macros.h> // MIN()
-#include <cfg/compiler.h>
-#include <cfg/debug.h>
-#include <cpu/irq.h>
-
-#include <drv/wdt.h>
-
-#include <kern/kfile.h>
-
-#include <string.h>
-
-/**
- * Definition of type for avr flash module.
- */
-typedef uint16_t avr_page_addr_t;
-typedef uint16_t avr_page_t;
-
-/**
- * Temporary buffer cointaing data block to
- * write on flash.
- */
-static uint8_t page_buf[SPM_PAGESIZE];
-
-/**
- * Flag for checking if current page is modified.
- */
-bool page_modified;
-
-/**
- * Current buffered page.
- */
-static avr_page_t curr_page = 0;
-
-/*
- * Private avr flush funtion.
- *
- * Write current buffered page in flash memory (if modified).
- * This function erase flash memory page before writing.
- *
- * This function is only use internaly in this module.
- */
-static void flash_avr_flush(void)
-{
- if (page_modified)
- {
- kprintf("Flushing page %d\n", curr_page);
-
- // Wait while the SPM instruction is busy.
- boot_spm_busy_wait();
-
- kprintf("Filling temparary page buffer...");
-
- // Fill the temporary buffer of the AVR
- for (avr_page_addr_t page_addr = 0; page_addr < SPM_PAGESIZE; page_addr += 2)
- {
- uint16_t word = ((uint16_t)page_buf[page_addr + 1] << 8) | page_buf[page_addr];
-
- ATOMIC(boot_page_fill(page_addr, word));
- }
- kprintf("Done.\n");
-
- wdt_reset();
-
- kprintf("Erasing page, addr %u...", curr_page * SPM_PAGESIZE);
-
- /* Page erase */
- ATOMIC(boot_page_erase(curr_page * SPM_PAGESIZE));
-
- /* Wait until the memory is erased. */
- boot_spm_busy_wait();
-
- kprintf("Done.\n");
- kprintf("Writing page, addr %u...", curr_page * SPM_PAGESIZE);
-
- /* Store buffer in flash page. */
- ATOMIC(boot_page_write(curr_page * SPM_PAGESIZE));
- boot_spm_busy_wait(); // Wait while the SPM instruction is busy.
-
- /*
- * Reenable RWW-section again. We need this if we want to jump back
- * to the application after bootloading.
- */
- ATOMIC(boot_rww_enable());
-
- page_modified = false;
- kprintf("Done.\n");
- }
-}
-
-
-/**
- * Flush avr flash function.
- *
- * Write current buffered page in flash memory (if modified).
- * This function erase flash memory page before writing.
- */
-static int flash_avr_kfileFlush(struct KFile * fd)
-{
- KFILE_ASSERT_GENERIC(fd);
- (void)fd;
- flash_avr_flush();
- return 0;
-}
-
-
-/**
- * Check current page and if \a page is different, load it in
- * temporary buffer.
- */
-static void flash_avr_loadPage(avr_page_t page)
-{
- if (page != curr_page)
- {
- flash_avr_flush();
- // Load page
- memcpy_P(page_buf, (const char *)(page * SPM_PAGESIZE), SPM_PAGESIZE);
- curr_page = page;
- kprintf("Loaded page %d\n", curr_page);
- }
-}
-
-/**
- * Write program memory.
- * Write \a size bytes from buffer \a _buf to file \a fd
- * \note Write operations are buffered.
- */
-static size_t flash_avr_write(struct KFile *fd, const void *_buf, size_t size)
-{
- KFILE_ASSERT_GENERIC(fd);
- const uint8_t *buf =(const uint8_t *)_buf;
-
- avr_page_t page;
- avr_page_addr_t page_addr;
- size_t total_write = 0;
-
- ASSERT(fd->seek_pos + size <= fd->size);
- size = MIN((uint32_t)size, fd->size - fd->seek_pos);
-
- kprintf("Writing at pos[%u]\n", fd->seek_pos);
- while (size)
- {
- page = fd->seek_pos / SPM_PAGESIZE;
- page_addr = fd->seek_pos % SPM_PAGESIZE;
-
- flash_avr_loadPage(page);
-
- size_t wr_len = MIN(size, SPM_PAGESIZE - page_addr);
- memcpy(page_buf + page_addr, buf, wr_len);
- page_modified = true;
-
- buf += wr_len;
- fd->seek_pos += wr_len;
- size -= wr_len;
- total_write += wr_len;
- }
- kprintf("written %u bytes\n", total_write);
- return total_write;
-}
-
-/**
- * Open flash file \a fd
- * \a name and \a mode are unused, cause flash memory is
- * threated like one file.
- */
-static void flash_avr_open(struct KFile *fd)
-{
- KFILE_ASSERT_GENERIC(fd);
- curr_page = 0;
- memcpy_P(page_buf, (const char *)(curr_page * SPM_PAGESIZE), SPM_PAGESIZE);
-
- fd->seek_pos = 0;
- fd->size = (uint16_t)(FLASHEND - CONFIG_BOOT_SIZE + 1);
- page_modified = false;
-
- kprintf("Flash file opened\n");
-}
-
-/**
- * Close file \a fd
- */
-static int flash_avr_close(UNUSED_ARG(struct KFile *,fd))
-{
- KFILE_ASSERT_GENERIC(fd);
- flash_avr_flush();
- kprintf("Flash file closed\n");
- return 0;
-}
-
-/**
- * Reopen file \a fd
- */
-static struct KFile *flash_avr_reopen(struct KFile *fd)
-{
- KFILE_ASSERT_GENERIC(fd);
- flash_avr_close(fd);
- flash_avr_open(fd);
- return fd;
-}
-
-
-/**
- * Read from file \a fd \a size bytes and put it in buffer \a buf
- * \return the number of bytes read.
- */
-static size_t flash_avr_read(struct KFile *fd, void *buf, size_t size)
-{
- KFILE_ASSERT_GENERIC(fd);
- ASSERT(fd->seek_pos + size <= fd->size);
- size = MIN((uint32_t)size, fd->size - fd->seek_pos);
-
- kprintf("Reading at pos[%u]\n", fd->seek_pos);
- // Flush current buffered page (if modified).
- flash_avr_flush();
-
- /*
- * AVR pointers are 16 bits wide, this hack is needed to avoid
- * compiler warning, cause fd->seek_pos is a 32bit offset.
- */
- const uint8_t *pgm_addr = (const uint8_t *)0;
- pgm_addr += fd->seek_pos;
-
- memcpy_P(buf, pgm_addr, size);
- fd->seek_pos += size;
- kprintf("Read %u bytes\n", size);
- return size;
-}
-
-/**
- * Init AVR flash read/write file.
- */
-void flash_avr_init(struct KFile *fd)
-{
- memset(fd, 0, sizeof(*fd));
- DB(fd->_type = KFT_GENERIC);
-
- // Set up flash programming functions.
- fd->reopen = flash_avr_reopen;
- fd->close = flash_avr_close;
- fd->read = flash_avr_read;
- fd->write = flash_avr_write;
- fd->seek = kfile_genericSeek;
- fd->flush = flash_avr_kfileFlush;
-
- flash_avr_open(fd);
-}
-
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