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Fix all bugs in the stk500pp implementation. 

Eliminate pagebuf, and use stack-allocated buffers instead.  The
pagesize of all current AVRs is at most 256 only anyway, and this is
unlikely to change with the STK500v2 protocol.  The previous pagebuf
implementation suffered from some possible buffer overrun.

In stk500pp_write_page(), do always write full pages, rather than
attempting to write a partial last page which did not get written at
all.  Fill the remaining bytes with 0xff.

For (paged) write operations, correctly synthesize the mode byte.
This mode byte is very different from the ISP mode byte (sigh).

In stk500pp_read_byte(), when performing read operations on paged
memory, start reading at the previous page boundary rather than the
current address.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@589 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Joerg Wunsch 2006-07-17 21:25:59 +00:00
parent ff8fb9928e
commit 7f53ceec4c
2 changed files with 108 additions and 65 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2006-07-17 Joerg Wunsch <j@uriah.heep.sax.de>
* stk500v2.c: Fix all bugs in stk500pp. Eliminate pagebuf, and
use a stack-allocated buffer instead, as the pagesize can be at
most 256 for all current AVRs anyway.
2006-07-17 Joerg Wunsch <j@uriah.heep.sax.de>
* main.c: Use mem->desc in place of upd->memtype in more places to

163
stk500v2.c
View File

@ -85,9 +85,6 @@ static unsigned char *eeprom_pagecache;
static unsigned long eeprom_pageaddr;
static unsigned int eeprom_pagesize;
/* page buffer for single-byte IO */
static unsigned char *pagebuf;
static unsigned char command_sequence = 1;
static int is_mk2; /* Is the device an AVRISP mkII? */
@ -99,6 +96,7 @@ static int stk500v2_is_page_empty(unsigned int address, int page_size,
const unsigned char *buf);
static int stk500v2_set_sck_period_mk2(PROGRAMMER * pgm, double v);
static unsigned int stk500v2_mode_for_pagesize(unsigned int pagesize);
static int stk500v2_send_mk2(PROGRAMMER * pgm, unsigned char * data, size_t len)
{
@ -563,23 +561,15 @@ static int stk500pp_initialize(PROGRAMMER * pgm, AVRPART * p)
}
free(flash_pagecache);
free(eeprom_pagecache);
free(pagebuf);
if ((pagebuf = malloc(flash_pagesize + 5)) == NULL) {
fprintf(stderr, "%s: stk500pp_initialize(): Out of memory\n",
progname);
return -1;
}
if ((flash_pagecache = malloc(flash_pagesize)) == NULL) {
fprintf(stderr, "%s: stk500pp_initialize(): Out of memory\n",
progname);
free(pagebuf);
return -1;
}
if ((eeprom_pagecache = malloc(eeprom_pagesize)) == NULL) {
fprintf(stderr, "%s: stk500pp_initialize(): Out of memory\n",
progname);
free(flash_pagecache);
free(pagebuf);
return -1;
}
flash_pageaddr = eeprom_pageaddr = (unsigned long)-1L;
@ -613,8 +603,6 @@ static void stk500pp_disable(PROGRAMMER * pgm)
unsigned char buf[16];
int result;
free(pagebuf);
pagebuf = NULL;
free(flash_pagecache);
flash_pagecache = NULL;
free(eeprom_pagecache);
@ -726,6 +714,7 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
unsigned long addr, unsigned char * value)
{
int result, cmdlen = 2;
char buf[266];
unsigned long paddr = 0UL, *paddr_ptr = NULL;
unsigned int pagesize = 0, use_ext_addr = 0, addrshift = 0;
unsigned char *cache_ptr = NULL;
@ -738,7 +727,7 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
return -1;
if (strcmp(mem->desc, "flash") == 0) {
pagebuf[0] = CMD_READ_FLASH_PP;
buf[0] = CMD_READ_FLASH_PP;
cmdlen = 3;
pagesize = mem->page_size;
if (pagesize == 0)
@ -757,7 +746,7 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
use_ext_addr = (1U << 31);
}
} else if (strcmp(mem->desc, "eeprom") == 0) {
pagebuf[0] = CMD_READ_EEPROM_PP;
buf[0] = CMD_READ_EEPROM_PP;
cmdlen = 3;
pagesize = mem->page_size;
if (pagesize == 0)
@ -766,20 +755,20 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
paddr_ptr = &eeprom_pageaddr;
cache_ptr = eeprom_pagecache;
} else if (strcmp(mem->desc, "lfuse") == 0) {
pagebuf[0] = CMD_READ_FUSE_PP;
buf[0] = CMD_READ_FUSE_PP;
addr = 0;
} else if (strcmp(mem->desc, "hfuse") == 0) {
pagebuf[0] = CMD_READ_FUSE_PP;
buf[0] = CMD_READ_FUSE_PP;
addr = 1;
} else if (strcmp(mem->desc, "efuse") == 0) {
pagebuf[0] = CMD_READ_FUSE_PP;
buf[0] = CMD_READ_FUSE_PP;
addr = 2;
} else if (strcmp(mem->desc, "lock") == 0) {
pagebuf[0] = CMD_READ_LOCK_PP;
buf[0] = CMD_READ_LOCK_PP;
} else if (strcmp(mem->desc, "calibration") == 0) {
pagebuf[0] = CMD_READ_OSCCAL_PP;
buf[0] = CMD_READ_OSCCAL_PP;
} else if (strcmp(mem->desc, "signature") == 0) {
pagebuf[0] = CMD_READ_SIGNATURE_PP;
buf[0] = CMD_READ_SIGNATURE_PP;
}
/*
@ -798,22 +787,22 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
if (cmdlen == 3) {
/* long command, fill in # of bytes */
pagebuf[1] = (pagesize >> 8) & 0xff;
pagebuf[2] = pagesize & 0xff;
buf[1] = (pagesize >> 8) & 0xff;
buf[2] = pagesize & 0xff;
/* flash and EEPROM reads require the load address command */
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift));
stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift));
} else {
pagebuf[1] = addr;
buf[1] = addr;
}
if (verbose >= 2)
fprintf(stderr, "%s: stk500pp_read_byte(): Sending read memory command: ",
progname);
result = stk500v2_command(pgm, pagebuf, cmdlen, pagesize == 0? 3: pagesize + 3);
result = stk500v2_command(pgm, buf, cmdlen, sizeof(buf));
if (result < 0 || pagebuf[1] != STATUS_CMD_OK) {
if (result < 0 || buf[1] != STATUS_CMD_OK) {
fprintf(stderr,
"%s: stk500pp_read_byte(): "
"timeout/error communicating with programmer (status %d)\n",
@ -823,10 +812,10 @@ static int stk500pp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
if (pagesize) {
*paddr_ptr = paddr;
memcpy(cache_ptr, pagebuf + 2, pagesize);
memcpy(cache_ptr, buf + 2, pagesize);
*value = cache_ptr[addr & (pagesize - 1)];
} else {
*value = pagebuf[2];
*value = buf[2];
}
return 0;
@ -836,6 +825,7 @@ static int stk500pp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
unsigned long addr, unsigned char data)
{
int result, cmdlen;
char buf[266];
unsigned long paddr = 0UL, *paddr_ptr = NULL;
unsigned int pagesize = 0, use_ext_addr = 0, addrshift = 0;
unsigned char *cache_ptr = NULL;
@ -848,7 +838,7 @@ static int stk500pp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
return -1;
if (strcmp(mem->desc, "flash") == 0) {
pagebuf[0] = CMD_PROGRAM_FLASH_PP;
buf[0] = CMD_PROGRAM_FLASH_PP;
pagesize = mem->page_size;
if (pagesize == 0)
pagesize = 2;
@ -866,7 +856,7 @@ static int stk500pp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
use_ext_addr = (1U << 31);
}
} else if (strcmp(mem->desc, "eeprom") == 0) {
pagebuf[0] = CMD_PROGRAM_EEPROM_PP;
buf[0] = CMD_PROGRAM_EEPROM_PP;
pagesize = mem->page_size;
if (pagesize == 0)
pagesize = 1;
@ -874,16 +864,16 @@ static int stk500pp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
paddr_ptr = &eeprom_pageaddr;
cache_ptr = eeprom_pagecache;
} else if (strcmp(mem->desc, "lfuse") == 0) {
pagebuf[0] = CMD_PROGRAM_FUSE_PP;
buf[0] = CMD_PROGRAM_FUSE_PP;
addr = 0;
} else if (strcmp(mem->desc, "hfuse") == 0) {
pagebuf[0] = CMD_PROGRAM_FUSE_PP;
buf[0] = CMD_PROGRAM_FUSE_PP;
addr = 1;
} else if (strcmp(mem->desc, "efuse") == 0) {
pagebuf[0] = CMD_PROGRAM_FUSE_PP;
buf[0] = CMD_PROGRAM_FUSE_PP;
addr = 2;
} else if (strcmp(mem->desc, "lock") == 0) {
pagebuf[0] = CMD_PROGRAM_LOCK_PP;
buf[0] = CMD_PROGRAM_LOCK_PP;
} else {
fprintf(stderr,
"%s: stk500pp_write_byte(): "
@ -907,29 +897,41 @@ static int stk500pp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
cache_ptr[addr & (pagesize - 1)] = data;
/* long command, fill in # of bytes */
pagebuf[1] = (pagesize >> 8) & 0xff;
pagebuf[2] = pagesize & 0xff;
buf[1] = (pagesize >> 8) & 0xff;
buf[2] = pagesize & 0xff;
pagebuf[3] = mem->mode | 0x80;
pagebuf[4] = mem->delay;
memcpy(pagebuf + 5, cache_ptr, pagesize);
/*
* Synthesize the mode byte. This is simpler than adding yet
* another parameter to the avrdude.conf file. We calculate the
* bits corresponding to the page size, as explained in AVR068.
* We set bit 7, to indicate this is to actually write the page to
* the target device. We set bit 6 to indicate this is the very
* last page to be programmed, whatever this means -- we just
* pretend we don't know any better. ;-) Bit 0 is set if this is
* a paged memory, which means it has a page size of more than 2.
*/
buf[3] = stk500v2_mode_for_pagesize(pagesize) | 0x80 | 0x40;
if (pagesize > 2)
buf[3] |= 0x01;
buf[4] = mem->delay;
memcpy(buf + 5, cache_ptr, pagesize);
/* flash and EEPROM reads require the load address command */
stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift));
} else {
pagebuf[1] = addr;
pagebuf[2] = data;
pagebuf[3] = 0; /* pulseWidth */
pagebuf[4] = 5; /* pollTimeout */
buf[1] = addr;
buf[2] = data;
buf[3] = 0; /* pulseWidth */
buf[4] = 5; /* pollTimeout */
}
if (verbose >= 2)
fprintf(stderr, "%s: stk500pp_write_byte(): Sending write memory command: ",
progname);
result = stk500v2_command(pgm, pagebuf, cmdlen, cmdlen);
result = stk500v2_command(pgm, buf, cmdlen, sizeof(buf));
if (result < 0 || pagebuf[1] != STATUS_CMD_OK) {
if (result < 0 || buf[1] != STATUS_CMD_OK) {
fprintf(stderr,
"%s: stk500pp_write_byte(): "
"timeout/error communicating with programmer (status %d)\n",
@ -1081,7 +1083,7 @@ static int stk500pp_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
unsigned int addr, block_size, last_addr, hiaddr, addrshift, use_ext_addr;
unsigned char commandbuf[5];
unsigned char commandbuf[5], buf[266];
int result;
DEBUG("STK500V2: stk500pp_paged_write(..,%s,%d,%d)\n",m->desc,page_size,n_bytes);
@ -1109,7 +1111,17 @@ static int stk500pp_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
eeprom_pageaddr = (unsigned long)-1L;
commandbuf[0] = CMD_PROGRAM_EEPROM_PP;
}
commandbuf[3] = m->mode | 0x80; // yes, write the page to flash
/*
* Synthesize the mode byte. This is simpler than adding yet
* another parameter to the avrdude.conf file. We calculate the
* bits corresponding to the page size, as explained in AVR068. We
* set bit 7, to indicate this is to actually write the page to the
* target device. We set bit 6 to indicate this is the very last
* page to be programmed, whatever this means -- we just pretend we
* don't know any better. ;-) Finally, we set bit 0 to say this is
* a paged memory, after all, that's why we got here at all.
*/
commandbuf[3] = stk500v2_mode_for_pagesize(page_size) | 0x80 | 0x40 | 0x01;
commandbuf[4] = m->delay;
last_addr = UINT_MAX; /* impossible address */
@ -1130,22 +1142,24 @@ static int stk500pp_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
}
}
memcpy(pagebuf, commandbuf, sizeof(commandbuf));
memcpy(buf, commandbuf, sizeof(commandbuf));
pagebuf[1] = block_size >> 8;
pagebuf[2] = block_size & 0xff;
buf[1] = page_size >> 8;
buf[2] = page_size & 0xff;
if ((last_addr == UINT_MAX) || (last_addr + block_size != addr)) {
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift));
}
last_addr=addr;
memcpy(pagebuf + 5, m->buf + addr, block_size);
memcpy(buf + 5, m->buf + addr, block_size);
if (block_size != page_size)
memset(buf + 5 + block_size, 0xff, page_size - block_size);
result = stk500v2_command(pgm, pagebuf, block_size + 5, page_size + 5);
if (pagebuf[1] != STATUS_CMD_OK) {
result = stk500v2_command(pgm, buf, page_size + 5, sizeof(buf));
if (buf[1] != STATUS_CMD_OK) {
fprintf(stderr, "%s: stk500pp_paged_write: write command failed with %d\n",
progname, pagebuf[1]);
progname, buf[1]);
return -1;
}
}
@ -1261,7 +1275,7 @@ static int stk500pp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
unsigned int addr, block_size, hiaddr, addrshift, use_ext_addr;
unsigned char commandbuf[3];
unsigned char commandbuf[3], buf[266];
int result;
DEBUG("STK500V2: stk500pp_paged_load(..,%s,%d,%d)\n",m->desc,page_size,n_bytes);
@ -1299,10 +1313,10 @@ static int stk500pp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
block_size = page_size;
DEBUG("block_size at addr %d is %d\n",addr,block_size);
memcpy(pagebuf, commandbuf, sizeof(commandbuf));
memcpy(buf, commandbuf, sizeof(commandbuf));
pagebuf[1] = block_size >> 8;
pagebuf[2] = block_size & 0xff;
buf[1] = block_size >> 8;
buf[2] = block_size & 0xff;
// Ensure a new "load extended address" will be issued
// when crossing a 64 KB boundary in flash.
@ -1311,10 +1325,10 @@ static int stk500pp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift));
}
result = stk500v2_command(pgm, pagebuf, 3, block_size + 3);
if (pagebuf[1] != STATUS_CMD_OK) {
result = stk500v2_command(pgm, buf, 3, sizeof(buf));
if (buf[1] != STATUS_CMD_OK) {
fprintf(stderr, "%s: stk500pp_paged_load: read command failed with %d\n",
progname, pagebuf[1]);
progname, buf[1]);
return -1;
}
#if 0
@ -1324,7 +1338,7 @@ static int stk500pp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
}
#endif
memcpy(&m->buf[addr], &pagebuf[2], block_size);
memcpy(&m->buf[addr], &buf[2], block_size);
}
return n_bytes;
@ -1469,6 +1483,29 @@ static int stk500v2_set_sck_period_mk2(PROGRAMMER * pgm, double v)
return stk500v2_setparm(pgm, PARAM_SCK_DURATION, i);
}
/*
* Return the "mode" value for the parallel and HVSP modes that
* corresponds to the pagesize.
*/
static unsigned int stk500v2_mode_for_pagesize(unsigned int pagesize)
{
switch (pagesize)
{
case 256: return 0u << 1;
case 2: return 1u << 1;
case 4: return 2u << 1;
case 8: return 3u << 1;
case 16: return 4u << 1;
case 32: return 5u << 1;
case 64: return 6u << 1;
case 128: return 7u << 1;
}
fprintf(stderr,
"%s: stk500v2_mode_for_pagesize(): invalid pagesize: %u\n",
progname, pagesize);
exit(1);
}
/* This code assumes that each count of the SCK duration parameter
represents 8/f, where f is the clock frequency of the STK500V2 master
processors (not the target). This number comes from Atmel