4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
33 * \author Daniele Basile <asterix@develer.com>
35 * \brief SAM3 Internal flash read/write driver.
40 #include "flash_sam3.h"
42 #include "cfg/cfg_emb_flash.h"
43 #include <cfg/macros.h>
45 // Define log settings for cfg/log.h
46 #define LOG_LEVEL CONFIG_FLASH_EMB_LOG_LEVEL
47 #define LOG_FORMAT CONFIG_FLASH_EMB_LOG_FORMAT
52 #include <cpu/power.h>
55 #include <io/kblock.h>
58 #include <drv/timer.h>
59 #include <drv/flash.h>
64 #define FLASH_MEM_SIZE 0x80000UL ///< Internal flash memory size
65 #define FLASH_PAGE_SIZE_BYTES 256 ///< Size of cpu flash memory page in bytes
66 #define FLASH_BANKS_NUM 2 ///< Number of flash banks
67 #define FLASH_BASE 0x0
76 * Really send the flash write command.
78 * \note This function has to be placed in RAM because
79 * executing code from flash while a writing process
80 * is in progress is forbidden.
82 RAM_FUNC NOINLINE static void write_page(uint32_t page)
84 // Send the 'write page' command
85 EEFC0_FCR = EEFC_FCR_FKEY | EFC_FCR_FCMD_EWP | EEFC_FCR_FARG(page);
87 // Wait for the end of command
88 while(!(EEFC0_FSR & BV(EEFC_FSR_FRDY)))
98 * After WR command cpu write bufferd page into flash memory.
101 INLINE void flash_sendWRcmd(uint32_t page)
105 LOG_INFO("Writing page %ld...\n", page);
107 IRQ_SAVE_DISABLE(flags);
115 * Return true if no error are occurred after flash memory
116 * read or write operation, otherwise return error code.
118 static bool flash_getStatus(struct KBlock *blk)
120 Flash *fls = FLASH_CAST(blk);
122 * This bit is set to one if an invalid command and/or a bad keywords was/were
123 * written in the Flash Command Register.
125 if(EEFC0_FSR & BV(EEFC_FSR_FCMDE))
127 fls->hw->status |= FLASH_WR_ERR;
128 LOG_ERR("flash not erased..\n");
133 * This bit is set to one if we programming of at least one locked lock
136 if(EEFC0_FSR & BV(EEFC_FSR_FLOCKE))
138 fls->hw->status |= FLASH_WR_PROTECT;
139 LOG_ERR("wr protect..\n");
146 static size_t sam3_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
148 memcpy(buf, (void *)(idx * blk->blk_size + FLASH_BASE + offset), size);
152 static size_t sam3_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
155 ASSERT(size == blk->blk_size);
157 uint32_t *addr = (uint32_t *)(idx * blk->blk_size + FLASH_BASE);
158 const uint8_t *buf = (const uint8_t *)_buf;
162 uint32_t data = (*(buf + 3) << 24) |
173 flash_sendWRcmd(idx);
175 if (!flash_getStatus(blk))
178 return blk->blk_size;
182 static int sam3_flash_error(struct KBlock *blk)
184 Flash *fls = FLASH_CAST(blk);
185 return fls->hw->status;
188 static void sam3_flash_clearerror(struct KBlock *blk)
190 Flash *fls = FLASH_CAST(blk);
194 static const KBlockVTable flash_sam3_buffered_vt =
196 .readDirect = sam3_flash_readDirect,
197 .writeDirect = sam3_flash_writeDirect,
199 .readBuf = kblock_swReadBuf,
200 .writeBuf = kblock_swWriteBuf,
201 .load = kblock_swLoad,
202 .store = kblock_swStore,
204 .error = sam3_flash_error,
205 .clearerr = sam3_flash_clearerror,
208 static const KBlockVTable flash_sam3_unbuffered_vt =
210 .readDirect = sam3_flash_readDirect,
211 .writeDirect = sam3_flash_writeDirect,
213 .error = sam3_flash_error,
214 .clearerr = sam3_flash_clearerror,
217 static struct FlashHardware flash_sam3_hw;
218 static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
220 static void common_init(Flash *fls)
222 memset(fls, 0, sizeof(*fls));
223 DB(fls->blk.priv.type = KBT_FLASH);
225 fls->hw = &flash_sam3_hw;
227 fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
228 fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
231 void flash_hw_init(Flash *fls, UNUSED_ARG(int, flags))
234 fls->blk.priv.vt = &flash_sam3_buffered_vt;
235 fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
236 fls->blk.priv.buf = flash_buf;
238 /* Load the first block in the cache */
239 memcpy(fls->blk.priv.buf, (void *)(FLASH_BASE), fls->blk.blk_size);
242 void flash_hw_initUnbuffered(Flash *fls, UNUSED_ARG(int, flags))
245 fls->blk.priv.vt = &flash_sam3_unbuffered_vt;