--- /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 2011 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ * \brief SAM3 Internal flash read/write driver.
+ *
+ *
+ */
+
+#include "flash_sam3.h"
+
+#include "cfg/cfg_emb_flash.h"
+#include <cfg/macros.h>
+
+// Define log settings for cfg/log.h
+#define LOG_LEVEL CONFIG_FLASH_EMB_LOG_LEVEL
+#define LOG_FORMAT CONFIG_FLASH_EMB_LOG_FORMAT
+#include <cfg/log.h>
+
+#include <cpu/irq.h>
+#include <cpu/attr.h>
+#include <cpu/power.h>
+
+#include <io/kfile.h>
+#include <io/kblock.h>
+#include <io/cm3.h>
+
+#include <drv/timer.h>
+#include <drv/flash.h>
+
+#include <string.h>
+
+
+#define FLASH_MEM_SIZE 0x80000UL ///< Internal flash memory size
+#define FLASH_PAGE_SIZE_BYTES 256 ///< Size of cpu flash memory page in bytes
+#define FLASH_BANKS_NUM 2 ///< Number of flash banks
+#define FLASH_BASE 0x0
+
+struct FlashHardware
+{
+ uint8_t status;
+};
+
+
+/**
+ * Really send the flash write command.
+ *
+ * \note This function has to be placed in RAM because
+ * executing code from flash while a writing process
+ * is in progress is forbidden.
+ */
+RAM_FUNC NOINLINE static void write_page(uint32_t page)
+{
+ // Send the 'write page' command
+ EEFC0_FCR = EEFC_FCR_FKEY | EFC_FCR_FCMD_EWP | EEFC_FCR_FARG(page);
+
+ // Wait for the end of command
+ while(!(EEFC0_FSR & BV(EEFC_FSR_FRDY)))
+ {
+ //NOP;
+ }
+}
+
+
+/**
+ * Send write command.
+ *
+ * After WR command cpu write bufferd page into flash memory.
+ *
+ */
+INLINE void flash_sendWRcmd(uint32_t page)
+{
+ cpu_flags_t flags;
+
+ LOG_INFO("Writing page %ld...\n", page);
+
+ IRQ_SAVE_DISABLE(flags);
+ write_page(page);
+
+ IRQ_RESTORE(flags);
+ LOG_INFO("Done\n");
+}
+
+/**
+ * Return true if no error are occurred after flash memory
+ * read or write operation, otherwise return error code.
+ */
+static bool flash_getStatus(struct KBlock *blk)
+{
+ Flash *fls = FLASH_CAST(blk);
+ /*
+ * This bit is set to one if an invalid command and/or a bad keywords was/were
+ * written in the Flash Command Register.
+ */
+ if(EEFC0_FSR & BV(EEFC_FSR_FCMDE))
+ {
+ fls->hw->status |= FLASH_WR_ERR;
+ LOG_ERR("flash not erased..\n");
+ return false;
+ }
+
+ /*
+ * This bit is set to one if we programming of at least one locked lock
+ * region.
+ */
+ if(EEFC0_FSR & BV(EEFC_FSR_FLOCKE))
+ {
+ fls->hw->status |= FLASH_WR_PROTECT;
+ LOG_ERR("wr protect..\n");
+ return false;
+ }
+
+ return true;
+}
+
+static size_t sam3_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
+{
+ memcpy(buf, (void *)(idx * blk->blk_size + FLASH_BASE + offset), size);
+ return size;
+}
+
+static size_t sam3_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
+{
+ ASSERT(offset == 0);
+ ASSERT(size == blk->blk_size);
+
+ uint32_t *addr = (uint32_t *)(idx * blk->blk_size + FLASH_BASE);
+ const uint8_t *buf = (const uint8_t *)_buf;
+
+ while (size)
+ {
+ uint32_t data = (*(buf + 3) << 24) |
+ (*(buf + 2) << 16) |
+ (*(buf + 1) << 8) |
+ *buf;
+ *addr = data;
+
+ size -= 4;
+ buf += 4;
+ addr++;
+ }
+
+ flash_sendWRcmd(idx);
+
+ if (!flash_getStatus(blk))
+ return 0;
+
+ return blk->blk_size;
+}
+
+
+static int sam3_flash_error(struct KBlock *blk)
+{
+ Flash *fls = FLASH_CAST(blk);
+ return fls->hw->status;
+}
+
+static void sam3_flash_clearerror(struct KBlock *blk)
+{
+ Flash *fls = FLASH_CAST(blk);
+ fls->hw->status = 0;
+}
+
+static const KBlockVTable flash_sam3_buffered_vt =
+{
+ .readDirect = sam3_flash_readDirect,
+ .writeDirect = sam3_flash_writeDirect,
+
+ .readBuf = kblock_swReadBuf,
+ .writeBuf = kblock_swWriteBuf,
+ .load = kblock_swLoad,
+ .store = kblock_swStore,
+
+ .error = sam3_flash_error,
+ .clearerr = sam3_flash_clearerror,
+};
+
+static const KBlockVTable flash_sam3_unbuffered_vt =
+{
+ .readDirect = sam3_flash_readDirect,
+ .writeDirect = sam3_flash_writeDirect,
+
+ .error = sam3_flash_error,
+ .clearerr = sam3_flash_clearerror,
+};
+
+static struct FlashHardware flash_sam3_hw;
+static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
+
+static void common_init(Flash *fls)
+{
+ memset(fls, 0, sizeof(*fls));
+ DB(fls->blk.priv.type = KBT_FLASH);
+
+ fls->hw = &flash_sam3_hw;
+
+ fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
+ fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
+}
+
+void flash_hw_init(Flash *fls, UNUSED_ARG(int, flags))
+{
+ common_init(fls);
+ fls->blk.priv.vt = &flash_sam3_buffered_vt;
+ fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
+ fls->blk.priv.buf = flash_buf;
+
+ /* Load the first block in the cache */
+ memcpy(fls->blk.priv.buf, (void *)(FLASH_BASE), fls->blk.blk_size);
+}
+
+void flash_hw_initUnbuffered(Flash *fls, UNUSED_ARG(int, flags))
+{
+ common_init(fls);
+ fls->blk.priv.vt = &flash_sam3_unbuffered_vt;
+}
+
--- /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 2011 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ * \brief SAM3 Internal flash read/write driver.
+ *
+ *
+ */
+
+#ifndef FLASH_SAM3_H
+#define FLASH_SAM3_H
+
+#endif /* FLASH_SAM3_H */
projects / bertos.git / commitdiff