mirror of
https://github.com/markqvist/OpenModem.git
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242 lines
5.6 KiB
C
242 lines
5.6 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2009 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \author Daniele Basile <asterix@develer.com>
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*
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* \brief At91sam7 Internal flash read/write driver.
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*
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*
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*/
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#include "flash_at91.h"
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#include "cfg/cfg_emb_flash.h"
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#include <cfg/macros.h>
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// Define log settings for cfg/log.h
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#define LOG_LEVEL CONFIG_FLASH_EMB_LOG_LEVEL
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#define LOG_FORMAT CONFIG_FLASH_EMB_LOG_FORMAT
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#include <cfg/log.h>
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#include <cpu/irq.h>
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#include <cpu/attr.h>
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#include <cpu/power.h>
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#include <io/kfile.h>
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#include <io/kblock.h>
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#include <io/arm.h>
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#include <drv/timer.h>
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#include <drv/flash.h>
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#include <string.h>
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struct FlashHardware
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{
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uint8_t status;
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};
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/**
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* Really send the flash write command.
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*
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* \note This function has to be placed in RAM because
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* executing code from flash while a writing process
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* is in progress is forbidden.
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*/
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RAM_FUNC NOINLINE static void write_page(uint32_t page)
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{
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// Send the 'write page' command
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MC_FCR = MC_KEY | MC_FCMD_WP | (MC_PAGEN_MASK & (page << 8));
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// Wait for the end of command
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while(!(MC_FSR & BV(MC_FRDY)))
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{
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//NOP;
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}
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}
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/**
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* Send write command.
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*
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* After WR command cpu write bufferd page into flash memory.
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*
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*/
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INLINE void flash_sendWRcmd(uint32_t page)
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{
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cpu_flags_t flags;
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LOG_INFO("Writing page %ld...\n", page);
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IRQ_SAVE_DISABLE(flags);
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write_page(page);
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IRQ_RESTORE(flags);
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LOG_INFO("Done\n");
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}
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/**
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* Return true if no error are occurred after flash memory
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* read or write operation, otherwise return error code.
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*/
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static bool flash_getStatus(struct KBlock *blk)
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{
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Flash *fls = FLASH_CAST(blk);
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/*
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* This bit is set to one if an invalid command and/or a bad keywords was/were
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* written in the Flash Command Register.
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*/
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if(MC_FSR & BV(MC_PROGE))
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{
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fls->hw->status |= FLASH_WR_ERR;
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LOG_ERR("flash not erased..\n");
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return false;
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}
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/*
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* This bit is set to one if we programming of at least one locked lock
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* region.
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*/
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if(MC_FSR & BV(MC_LOCKE))
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{
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fls->hw->status |= FLASH_WR_PROTECT;
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LOG_ERR("wr protect..\n");
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return false;
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}
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return true;
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}
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static size_t at91_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
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{
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memcpy(buf, (void *)(idx * blk->blk_size + FLASH_BASE + offset), size);
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return size;
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}
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static size_t at91_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
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{
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ASSERT(offset == 0);
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ASSERT(size == blk->blk_size);
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uint32_t *addr = (uint32_t *)(idx * blk->blk_size + FLASH_BASE);
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const uint8_t *buf = (const uint8_t *)_buf;
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while (size)
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{
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uint32_t data = (*(buf + 3) << 24) |
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(*(buf + 2) << 16) |
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(*(buf + 1) << 8) |
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*buf;
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*addr = data;
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size -= 4;
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buf += 4;
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addr++;
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}
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flash_sendWRcmd(idx);
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if (!flash_getStatus(blk))
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return 0;
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return blk->blk_size;
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}
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static int at91_flash_error(struct KBlock *blk)
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{
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Flash *fls = FLASH_CAST(blk);
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return fls->hw->status;
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}
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static void at91_flash_clearerror(struct KBlock *blk)
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{
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Flash *fls = FLASH_CAST(blk);
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fls->hw->status = 0;
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}
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static const KBlockVTable flash_at91_buffered_vt =
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{
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.readDirect = at91_flash_readDirect,
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.writeDirect = at91_flash_writeDirect,
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.readBuf = kblock_swReadBuf,
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.writeBuf = kblock_swWriteBuf,
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.load = kblock_swLoad,
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.store = kblock_swStore,
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.error = at91_flash_error,
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.clearerr = at91_flash_clearerror,
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};
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static const KBlockVTable flash_at91_unbuffered_vt =
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{
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.readDirect = at91_flash_readDirect,
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.writeDirect = at91_flash_writeDirect,
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.error = at91_flash_error,
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.clearerr = at91_flash_clearerror,
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};
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static struct FlashHardware flash_at91_hw;
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static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
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static void common_init(Flash *fls)
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{
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memset(fls, 0, sizeof(*fls));
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DB(fls->blk.priv.type = KBT_FLASH);
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fls->hw = &flash_at91_hw;
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fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
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fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
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}
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void flash_hw_init(Flash *fls, UNUSED_ARG(int, flags))
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{
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common_init(fls);
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fls->blk.priv.vt = &flash_at91_buffered_vt;
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fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
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fls->blk.priv.buf = flash_buf;
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/* Load the first block in the cache */
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memcpy(fls->blk.priv.buf, (void *)(FLASH_BASE), fls->blk.blk_size);
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}
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void flash_hw_initUnbuffered(Flash *fls, UNUSED_ARG(int, flags))
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{
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common_init(fls);
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fls->blk.priv.vt = &flash_at91_unbuffered_vt;
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}
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