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controller/Bootloader/flash.c

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/* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
* Modifications by Jacob Alexander 2014-2015 <haata@kiibohd.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
// ----- Local Includes -----
#include "mchck.h"
#include "debug.h"
// ----- Variables -----
uint32_t flash_ALLOW_BRICKABLE_ADDRESSES;
// ----- Functions -----
/* This will have to live in SRAM. */
__attribute__((section(".ramtext.ftfl_submit_cmd"), long_call))
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int ftfl_submit_cmd()
{
FTFL.fstat.raw = ((struct FTFL_FSTAT_t){
.ccif = 1,
//.rdcolerr = 1,
.accerr = 1,
.fpviol = 1
}).raw;
// Wait for the operation to complete
struct FTFL_FSTAT_t stat;
while (!(stat = FTFL.fstat).ccif); // XXX maybe WFI?
// Mask error bits
return stat.raw & (FTFL_FSTAT_RDCOLERR | FTFL_FSTAT_ACCERR | FTFL_FSTAT_FPVIOL | FTFL_FSTAT_MGSTAT0);
//return (!!stat.mgstat0);
}
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int flash_prepare_flashing()
{
/* switch to FlexRAM */
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if ( !FTFL.fcnfg.ramrdy )
{
FTFL.fccob.set_flexram.fcmd = FTFL_FCMD_SET_FLEXRAM;
FTFL.fccob.set_flexram.flexram_function = FTFL_FLEXRAM_RAM;
return (ftfl_submit_cmd());
}
return (0);
}
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int flash_read_1s_sector( uintptr_t addr, size_t num )
{
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FTFL.fccob.read_1s_section.fcmd = FTFL_FCMD_READ_1s_SECTION;
FTFL.fccob.read_1s_section.addr = addr;
FTFL.fccob.read_1s_section.margin = FTFL_MARGIN_NORMAL;
FTFL.fccob.read_1s_section.num_words = num;
return ftfl_submit_cmd();
}
int flash_erase_sector( uintptr_t addr )
{
#ifdef FLASH_DEBUG
// Debug
print("Erasing Sector: address(");
printHex( addr );
printNL(")");
#endif
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if ( addr < (uintptr_t)&_app_rom && flash_ALLOW_BRICKABLE_ADDRESSES != 0x00023420 )
return (-1);
FTFL.fccob.erase.fcmd = FTFL_FCMD_ERASE_SECTOR;
FTFL.fccob.erase.addr = addr;
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return ftfl_submit_cmd();
}
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int flash_program_section_longwords( uintptr_t addr, size_t num_words )
{
#ifdef FLASH_DEBUG
// Debug
print("Programming Sector: address(");
printHex( addr );
print(") longwords(");
printHex( num_words );
printNL(")");
#endif
FTFL.fccob.program_section.fcmd = FTFL_FCMD_PROGRAM_SECTION;
FTFL.fccob.program_section.addr = addr;
FTFL.fccob.program_section.num_words = num_words;
return ftfl_submit_cmd();
}
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int flash_program_section_phrases( uintptr_t addr, size_t num_phrases )
{
#ifdef FLASH_DEBUG
// Debug
print("Programming Sector: address(");
printHex( addr );
print(") phrases(");
printHex( num_phrases );
printNL(")");
#endif
FTFL.fccob.program_section.fcmd = FTFL_FCMD_PROGRAM_SECTION;
FTFL.fccob.program_section.addr = addr;
FTFL.fccob.program_section.num_words = num_phrases;
return ftfl_submit_cmd();
}
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int flash_program_sector( uintptr_t addr, size_t len )
{
if ( len != USB_DFU_TRANSFER_SIZE )
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return 1;
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#if defined(_mk20dx128vlf5_)
// Check if this is the beginning of a sector
// Only erase if necessary
if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
&& flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 4 )
&& flash_erase_sector( addr ) )
return 1;
// Program sector
return flash_program_section_longwords( addr, FLASH_SECTOR_SIZE / 4 );
#elif defined(_mk20dx256vlh7_)
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// Check if beginning of sector and erase if not empty
// Each sector is 2 kB in length, but we can only write to half a sector at a time
// We can only erase an entire sector at a time
if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
&& flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 8 )
&& flash_erase_sector( addr ) )
return 1;
// Program half-sector
return flash_program_section_phrases( addr, FLASH_SECTOR_SIZE / 16 );
#endif
}
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int flash_prepare_reading()
{
return (0);
}
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int flash_read_sector( uintptr_t addr, size_t len )
{
return (0);
}
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void *flash_get_staging_area( uintptr_t addr, size_t len )
{
if ( (addr & (USB_DFU_TRANSFER_SIZE - 1)) != 0 || len != USB_DFU_TRANSFER_SIZE )
return (NULL);
return (FlexRAM);
}