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/***************************************************************************
* Copyright (C) 2011 by Rodrigo L. Rosa *
* rodrigorosa.LG@gmail.com *
* *
* Based on a file written by: *
* Kevin McGuire *
* Marcel Wijlaars *
* Michael Ashton *
* *
* This program 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
/**
* @file dsp5680xx_flash.c
* @author Rodrigo L. Rosa <rodrigorosa.LG@gmail.com>
* @date Thu Jun 9 18:21:58 2011
*
* @brief This file implements the basic functions to run flashing commands
* from the TCL interface.
* It allows the user to flash the Freescale 5680xx DSP.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef DSP5680XX_FLASH_H
#define DSP5680XX_FLASH_H
#include "imp.h"
#include <helper/binarybuffer.h>
#include <helper/time_support.h>
#include <target/algorithm.h>
#include <target/dsp5680xx.h>
struct dsp5680xx_flash_bank {
struct working_area *write_algorithm;
};
static int dsp5680xx_build_sector_list(struct flash_bank *bank){
uint32_t offset = HFM_FLASH_BASE_ADDR;
bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
int i;
for (i = 0; i < bank->num_sectors; ++i){
bank->sectors[i].offset = i*HFM_SECTOR_SIZE;
bank->sectors[i].size = HFM_SECTOR_SIZE;
offset += bank->sectors[i].size;
bank->sectors[i].is_erased = -1;
bank->sectors[i].is_protected = -1;
}
LOG_USER("%s not tested yet.",__FUNCTION__);
return ERROR_OK;
}
// flash bank dsp5680xx 0 0 0 0 <target#>
FLASH_BANK_COMMAND_HANDLER(dsp5680xx_flash_bank_command){
struct dsp5680xx_flash_bank *nbank;
nbank = malloc(sizeof(struct dsp5680xx_flash_bank));
bank->base = HFM_FLASH_BASE_ADDR;
bank->size = HFM_SIZE_BYTES; // top 4k not accessible
bank->driver_priv = nbank;
bank->num_sectors = HFM_SECTOR_COUNT;
dsp5680xx_build_sector_list(bank);
return ERROR_OK;
}
/**
* A memory mapped register (PROT) holds information regarding sector protection.
* Protection refers to undesired core access.
* The value in this register is loaded from flash upon reset.
*
* @param bank
*
* @return
*/
static int dsp5680xx_flash_protect_check(struct flash_bank *bank){
int retval = ERROR_OK;
uint16_t protected = 0;
retval = dsp5680xx_f_protect_check(bank->target,&protected);
if(retval != ERROR_OK){
for(int i = 0;i<HFM_SECTOR_COUNT;i++)
bank->sectors[i].is_protected = -1;
return ERROR_OK;
}
for(int i = 0;i<HFM_SECTOR_COUNT/2;i++){
if(protected & 1){
bank->sectors[2*i].is_protected = 1;
bank->sectors[2*i+1].is_protected = 1;
}else{
bank->sectors[2*i].is_protected = 0;
bank->sectors[2*i+1].is_protected = 0;
}
protected = (protected >> 1);
}
return retval;
}
/**
* Protection funcionality is not implemented.
* The current implementation applies/removes security on the chip.
* The chip is effectively secured/unsecured after the first reset following the execution of this function.
*
* @param bank
* @param set Apply or remove security on the chip.
* @param first This parameter is ignored.
* @param last This parameter is ignored.
*
* @return
*/
static int dsp5680xx_flash_protect(struct flash_bank *bank, int set, int first, int last){
// This applies security to flash module after next reset, it does not actually apply protection (protection refers to undesired access from the core)
int retval;
if(set)
retval = dsp5680xx_f_lock(bank->target);
else
retval = dsp5680xx_f_unlock(bank->target);
return retval;
}
/**
* The dsp5680xx use word addressing. The "/2" that appear in the following code are a workaround for the fact that OpenOCD uses byte addressing.
*
* @param bank
* @param buffer Data to write to flash.
* @param offset
* @param count In bytes (2 bytes per address).
*
* @return
*/
static int dsp5680xx_flash_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count){
int retval;
if((offset + count/2)>bank->size){
LOG_ERROR("%s: Flash bank cannot fit data.",__FUNCTION__);
return ERROR_FAIL;
}
if(offset%2){
LOG_ERROR("%s: Writing to odd addresses not supported. This chip uses word addressing, Openocd only supports byte addressing. The workaround results in disabling writing to odd byte addresses.",__FUNCTION__);
return ERROR_FAIL;
}
retval = dsp5680xx_f_wr(bank->target, buffer, bank->base + offset/2, count, 0);
uint32_t addr_word;
for(addr_word = bank->base + offset/2;addr_word<count/2;addr_word+=(HFM_SECTOR_SIZE/2)){
if(retval == ERROR_OK)
bank->sectors[addr_word/(HFM_SECTOR_SIZE/2)].is_erased = 0;
else
bank->sectors[addr_word/(HFM_SECTOR_SIZE/2)].is_erased = -1;
}
return retval;
}
static int dsp5680xx_probe(struct flash_bank *bank){
LOG_DEBUG("%s not implemented",__FUNCTION__);
return ERROR_OK;
}
static int dsp5680xx_flash_info(struct flash_bank *bank, char *buf, int buf_size){
snprintf(buf, buf_size, "\ndsp5680xx flash driver info:\n - Currently only full erase/lock/unlock are implemented. \n - Call with bank==0 and sector 0 to 0.\n - Protect requires arp_init-reset to complete. \n - Before removing protection the master tap must be selected, and arp_init-reset is required to complete unlocking.");
return ERROR_OK;
}
/**
* The flash module (FM) on the dsp5680xx supports both individual sector and mass erase of the flash memory.
* If this function is called with @first == @last == 0 or if @first is the first sector (#0) and @last is the last sector then the mass erase command is executed (much faster than erasing each sector individually).
*
* @param bank
* @param first
* @param last
*
* @return
*/
static int dsp5680xx_flash_erase(struct flash_bank * bank, int first, int last){
int retval;
retval = dsp5680xx_f_erase(bank->target, (uint32_t) first, (uint32_t) last);
if(retval == ERROR_OK)
for(int i = first;i<=last;i++)
bank->sectors[i].is_erased = 1;
else
// If an error occurred unknown status is set even though some sector could have been correctly erased.
for(int i = first;i<=last;i++)
bank->sectors[i].is_erased = -1;
return retval;
}
/**
* The flash module (FM) on the dsp5680xx support a blank check function.
* This function executes the FM's blank check functionality on each and every sector.
*
* @param bank
*
* @return
*/
static int dsp5680xx_flash_erase_check(struct flash_bank * bank){
int retval = ERROR_OK;
uint8_t erased = 0;
uint32_t i;
for(i=0;i<HFM_SECTOR_COUNT;i++){
if(bank->sectors[i].is_erased == -1){
retval = dsp5680xx_f_erase_check(bank->target,&erased,i);
if (retval != ERROR_OK){
bank->sectors[i].is_erased = -1;
}else{
if(erased)
bank->sectors[i].is_erased = 1;
else
bank->sectors[i].is_erased = 0;
}
}
}
return retval;
}
struct flash_driver dsp5680xx_flash = {
.name = "dsp5680xx_flash",
.flash_bank_command = dsp5680xx_flash_bank_command,
.erase = dsp5680xx_flash_erase,
.protect = dsp5680xx_flash_protect,
.write = dsp5680xx_flash_write,
//.read = default_flash_read,
.probe = dsp5680xx_probe,
.auto_probe = dsp5680xx_probe,
.erase_check = dsp5680xx_flash_erase_check,
.protect_check = dsp5680xx_flash_protect_check,
.info = dsp5680xx_flash_info
};
#endif // dsp5680xx_flash.h
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