forked from Archive/PX4-Autopilot
added otp library
This commit is contained in:
Buzz
Lorenz Meier
parent
94b539dfdd
commit
4ef7817d96
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@ -49,4 +49,6 @@ SRCS = err.c \
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airspeed.c \
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system_params.c \
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mavlink_log.c \
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rc_check.c
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rc_check.c \
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otp.c
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@ -0,0 +1,191 @@
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/****************************************************************************
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*
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* Copyright (C) 2012-2013 PX4 Development Team. All rights reserved.
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* Authors:
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* Lorenz Meier <lm@inf.ethz.ch>
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* David "Buzz" Bussenschutt <davidbuzz@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file otp.c
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* otp estimation
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*
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* @author Lorenz Meier <lm@inf.ethz.ch>
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* @author David "Buzz" Bussenschutt <davidbuzz@gmail.com>
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*
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*/
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#include <stdio.h>
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#include <math.h>
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#include <unistd.h>
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#include <string.h> // memset
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#include "conversions.h"
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#include "otp.h"
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#include "err.h" // warnx
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#include <assert.h>
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int val_read(void* dest, volatile const void* src, int bytes)
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{
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int i;
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for (i = 0; i < bytes / 4; i++) {
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*(((volatile uint32_t *)dest) + i) = *(((volatile uint32_t *)src) + i);
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}
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return i*4;
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}
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int write_otp(uint8_t id_type, uint32_t vid, uint32_t pid, char* signature)
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{
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warnx("write_otp: PX4 / %02X / %02X / %02X / ... etc \n",id_type, vid, pid);
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// descriptor
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F_write_byte( ADDR_OTP_START, 'P'); // write the 'P' from PX4. to first byte in OTP
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F_write_byte( ADDR_OTP_START+1, 'X'); // write the 'P' from PX4. to first byte in OTP
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F_write_byte( ADDR_OTP_START+2, '4');
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F_write_byte( ADDR_OTP_START+3, '\0');
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//id_type
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F_write_byte( ADDR_OTP_START+4, id_type);
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// vid and pid are 4 bytes each
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F_write_word( ADDR_OTP_START+5, vid);
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F_write_word( ADDR_OTP_START+9, pid);
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// leave some 19 bytes of space, and go to the next block...
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// then the auth sig starts
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for ( int i = 0 ; i < 128 ; i++ ) {
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F_write_byte( ADDR_OTP_START+32+i, signature[i]);
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}
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}
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int lock_otp(void)
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{
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//determine the required locking size - can only write full lock bytes */
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// int size = sizeof(struct otp) / 32;
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//
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// struct otp_lock otp_lock_mem;
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//
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// memset(&otp_lock_mem, OTP_LOCK_UNLOCKED, sizeof(otp_lock_mem));
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// for (int i = 0; i < sizeof(otp_lock_mem) / sizeof(otp_lock_mem.lock_bytes[0]); i++)
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// otp_lock_mem.lock_bytes[i] = OTP_LOCK_LOCKED;
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//XXX add the actual call here to write the OTP_LOCK bytes only at final stage
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// val_copy(lock_ptr, &otp_lock_mem, sizeof(otp_lock_mem));
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int locksize = 5;
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// or just realise it's exctly 5x 32byte blocks we need to lock. 1 block for ID,type,vid,pid, and 4 blocks for certificate, which is 128 bytes.
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for ( int i = 0 ; i < locksize ; i++ ) {
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F_write_byte( ADDR_OTP_LOCK_START+i, OTP_LOCK_LOCKED);
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}
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}
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// COMPLETE, BUSY, or other flash error?
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uint8_t F_GetStatus(void) {
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uint8_t fs = F_COMPLETE;
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if((FLASH->status & F_BSY) == F_BSY) { fs = F_BUSY; } else {
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if((FLASH->status & F_WRPERR) != (uint32_t)0x00) { fs = F_ERROR_WRP; } else {
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if((FLASH->status & (uint32_t)0xEF) != (uint32_t)0x00) { fs = F_ERROR_PROGRAM; } else {
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if((FLASH->status & F_OPERR) != (uint32_t)0x00) { fs = F_ERROR_OPERATION; } else {
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fs = F_COMPLETE; } } } }
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return fs;
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}
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// enable FLASH Registers
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void F_unlock(void)
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{
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if((FLASH->control & F_CR_LOCK) != 0)
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{
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FLASH->key = F_KEY1;
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FLASH->key = F_KEY2;
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}
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}
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// lock the FLASH Registers
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void F_lock(void)
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{
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FLASH->control |= F_CR_LOCK;
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}
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// flash write word.
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uint8_t F_write_word(uint32_t Address, uint32_t Data)
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{
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unsigned char octet[4] = {0,0,0,0};
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for (int i=0; i<4; i++)
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{
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octet[i] = ( Data >> (i*8) ) & 0xFF;
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F_write_byte(Address+i,octet[i]);
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}
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}
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// flash write byte
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uint8_t F_write_byte(uint32_t Address, uint8_t Data)
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{
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volatile uint8_t status = F_COMPLETE;
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//warnx("F_write_byte: %08X %02d", Address , Data ) ;
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//Check the parameters
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assert(IS_F_ADDRESS(Address));
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//Wait for FLASH operation to complete by polling on BUSY flag.
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status = F_GetStatus();
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while(status == F_BUSY){ status = F_GetStatus();}
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if(status == F_COMPLETE)
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{
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//if the previous operation is completed, proceed to program the new data
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FLASH->control &= CR_PSIZE_MASK;
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FLASH->control |= F_PSIZE_BYTE;
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FLASH->control |= F_CR_PG;
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*(volatile uint8_t*)Address = Data;
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//Wait for FLASH operation to complete by polling on BUSY flag.
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status = F_GetStatus();
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while(status == F_BUSY){ status = F_GetStatus();}
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//if the program operation is completed, disable the PG Bit
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FLASH->control &= (~F_CR_PG);
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}
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//Return the Program Status
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return status;
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}
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@ -0,0 +1,156 @@
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/****************************************************************************
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*
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* Copyright (C) 2012-2013 PX4 Development Team. All rights reserved.
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* Authors:
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* Lorenz Meier <lm@inf.ethz.ch>
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* David "Buzz" Bussenschutt <davidbuzz@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file otp.h
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* One TIme Programmable ( OTP ) Flash routine/s.
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*
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* @author Lorenz Meier <lm@inf.ethz.ch>
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* @author David "Buzz" Bussenschutt <davidbuzz@gmail.com>
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*
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*/
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#ifndef OTP_H_
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#define OTP_H_
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__BEGIN_DECLS
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#define ADDR_OTP_START 0x1FFF7800
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#define ADDR_OTP_LOCK_START 0x1FFF7A00
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#define OTP_LOCK_LOCKED 0x00
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#define OTP_LOCK_UNLOCKED 0xFF
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#include <unistd.h>
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#include <stdio.h>
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// possible flash statuses
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#define F_BUSY 1
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#define F_ERROR_WRP 2
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#define F_ERROR_PROGRAM 3
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#define F_ERROR_OPERATION 4
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#define F_COMPLETE 5
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typedef struct
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{
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volatile uint32_t accesscontrol; // 0x00
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volatile uint32_t key; // 0x04
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volatile uint32_t optionkey; // 0x08
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volatile uint32_t status; // 0x0C
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volatile uint32_t control; // 0x10
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volatile uint32_t optioncontrol; //0x14
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} flash_registers;
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#define PERIPH_BASE ((uint32_t)0x40000000) //Peripheral base address
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#define AHB1PERIPH_BASE (PERIPH_BASE + 0x00020000)
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#define F_R_BASE (AHB1PERIPH_BASE + 0x3C00)
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#define FLASH ((flash_registers *) F_R_BASE)
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#define F_BSY ((uint32_t)0x00010000) //FLASH Busy flag bit
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#define F_OPERR ((uint32_t)0x00000002) //FLASH operation Error flag bit
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#define F_WRPERR ((uint32_t)0x00000010) //FLASH Write protected error flag bit
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#define CR_PSIZE_MASK ((uint32_t)0xFFFFFCFF)
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#define F_PSIZE_WORD ((uint32_t)0x00000200)
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#define F_PSIZE_BYTE ((uint32_t)0x00000000)
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#define F_CR_PG ((uint32_t)0x00000001) // a bit in the F_CR register
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#define F_CR_LOCK ((uint32_t)0x80000000) // also another bit.
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#define F_KEY1 ((uint32_t)0x45670123)
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#define F_KEY2 ((uint32_t)0xCDEF89AB)
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#define IS_F_ADDRESS(ADDRESS) ((((ADDRESS) >= 0x08000000) && ((ADDRESS) < 0x080FFFFF)) || (((ADDRESS) >= 0x1FFF7800) && ((ADDRESS) < 0x1FFF7A0F)))
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#pragma pack(push, 1)
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/*
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* The OTP area is divided into 16 OTP data blocks of 32 bytes and one lock OTP block of 16 bytes.
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* The OTP data and lock blocks cannot be erased. The lock block contains 16 bytes LOCKBi (0 ≤ i ≤ 15)
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* to lock the corresponding OTP data block (blocks 0 to 15). Each OTP data block can be programmed
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* until the value 0x00 is programmed in the corresponding OTP lock byte. The lock bytes must only
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* contain 0x00 and 0xFF values, otherwise the OTP bytes might not be taken into account correctly.
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*/
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struct otp {
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// first 32 bytes = the '0' Block
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char id[4]; ///4 bytes < 'P' 'X' '4' '\n'
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uint8_t id_type; ///1 byte < 0 for USB VID, 1 for generic VID
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uint32_t vid; ///4 bytes
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uint32_t pid; ///4 bytes
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char unused[19]; ///19 bytes
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// Cert-of-Auth is next 4 blocks ie 1-4 ( where zero is first block )
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char signature[128];
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// insert extras here
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uint32_t lock_bytes[4];
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};
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struct otp_lock {
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uint8_t lock_bytes[16];
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};
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#pragma pack(pop)
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#define UDID_START 0x1FFF7A10
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#define ADDR_F_SIZE 0x1FFF7A22
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#pragma pack(push, 1)
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union udid {
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uint32_t serial[3];
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char data[12];
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};
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#pragma pack(pop)
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/**
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* s
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*/
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//__EXPORT float calc_indicated_airspeed(float differential_pressure);
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__EXPORT void F_unlock(void);
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__EXPORT void F_lock(void);
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__EXPORT int val_read(void* dest, volatile const void* src, int bytes);
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__EXPORT int val_write(volatile void* dest, const void* src, int bytes);
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__EXPORT int write_otp(uint8_t id_type, uint32_t vid, uint32_t pid, char* signature);
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__EXPORT int lock_otp(void);
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__EXPORT uint8_t F_write_byte(uint32_t Address, uint8_t Data);
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__EXPORT uint8_t F_write_word(uint32_t Address, uint32_t Data);
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__END_DECLS
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#endif
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