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flashrom.c
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flashrom.c
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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2004 Tyan Corp <[email protected]>
* Copyright (C) 2005-2008 coresystems GmbH
* Copyright (C) 2008,2009 Carl-Daniel Hailfinger
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#if HAVE_UTSNAME == 1
#include <sys/utsname.h>
#endif
#include "flash.h"
#include "flashchips.h"
#include "programmer.h"
const char * const flashrom_version = FLASHROM_VERSION;
char *chip_to_probe = NULL;
int verbose = 0;
#if CONFIG_INTERNAL == 1
enum programmer programmer = PROGRAMMER_INTERNAL;
#elif CONFIG_DUMMY == 1
enum programmer programmer = PROGRAMMER_DUMMY;
#else
/* If neither internal nor dummy are selected, we must pick a sensible default.
* Since there is no reason to prefer a particular external programmer, we fail
* if more than one of them is selected. If only one is selected, it is clear
* that the user wants that one to become the default.
*/
#if CONFIG_NIC3COM+CONFIG_NICREALTEK+CONFIG_NICNATSEMI+CONFIG_GFXNVIDIA+CONFIG_DRKAISER+CONFIG_SATASII+CONFIG_ATAHPT+CONFIG_FT2232_SPI+CONFIG_SERPROG+CONFIG_BUSPIRATE_SPI+CONFIG_DEDIPROG+CONFIG_RAYER_SPI+CONFIG_NICINTEL_SPI > 1
#error Please enable either CONFIG_DUMMY or CONFIG_INTERNAL or disable support for all programmers except one.
#endif
enum programmer programmer =
#if CONFIG_NIC3COM == 1
PROGRAMMER_NIC3COM
#endif
#if CONFIG_NICREALTEK == 1
PROGRAMMER_NICREALTEK
PROGRAMMER_NICREALTEK2
#endif
#if CONFIG_NICNATSEMI == 1
PROGRAMMER_NICNATSEMI
#endif
#if CONFIG_GFXNVIDIA == 1
PROGRAMMER_GFXNVIDIA
#endif
#if CONFIG_DRKAISER == 1
PROGRAMMER_DRKAISER
#endif
#if CONFIG_SATASII == 1
PROGRAMMER_SATASII
#endif
#if CONFIG_ATAHPT == 1
PROGRAMMER_ATAHPT
#endif
#if CONFIG_FT2232_SPI == 1
PROGRAMMER_FT2232_SPI
#endif
#if CONFIG_SERPROG == 1
PROGRAMMER_SERPROG
#endif
#if CONFIG_BUSPIRATE_SPI == 1
PROGRAMMER_BUSPIRATE_SPI
#endif
#if CONFIG_DEDIPROG == 1
PROGRAMMER_DEDIPROG
#endif
#if CONFIG_RAYER_SPI == 1
PROGRAMMER_RAYER_SPI
#endif
#if CONFIG_NICINTEL_SPI == 1
PROGRAMMER_NICINTEL_SPI
#endif
;
#endif
static char *programmer_param = NULL;
/* Supported buses for the current programmer. */
enum chipbustype buses_supported;
/*
* Programmers supporting multiple buses can have differing size limits on
* each bus. Store the limits for each bus in a common struct.
*/
struct decode_sizes max_rom_decode;
/* If nonzero, used as the start address of bottom-aligned flash. */
unsigned long flashbase;
/* Is writing allowed with this programmer? */
int programmer_may_write;
const struct programmer_entry programmer_table[] = {
#if CONFIG_INTERNAL == 1
{
.name = "internal",
.init = internal_init,
.shutdown = internal_shutdown,
.map_flash_region = physmap,
.unmap_flash_region = physunmap,
.chip_readb = internal_chip_readb,
.chip_readw = internal_chip_readw,
.chip_readl = internal_chip_readl,
.chip_readn = internal_chip_readn,
.chip_writeb = internal_chip_writeb,
.chip_writew = internal_chip_writew,
.chip_writel = internal_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_DUMMY == 1
{
.name = "dummy",
.init = dummy_init,
.shutdown = dummy_shutdown,
.map_flash_region = dummy_map,
.unmap_flash_region = dummy_unmap,
.chip_readb = dummy_chip_readb,
.chip_readw = dummy_chip_readw,
.chip_readl = dummy_chip_readl,
.chip_readn = dummy_chip_readn,
.chip_writeb = dummy_chip_writeb,
.chip_writew = dummy_chip_writew,
.chip_writel = dummy_chip_writel,
.chip_writen = dummy_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_NIC3COM == 1
{
.name = "nic3com",
.init = nic3com_init,
.shutdown = nic3com_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = nic3com_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = nic3com_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_NICREALTEK == 1
{
.name = "nicrealtek",
.init = nicrealtek_init,
.shutdown = nicrealtek_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = nicrealtek_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = nicrealtek_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
{
.name = "nicsmc1211",
.init = nicsmc1211_init,
.shutdown = nicrealtek_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = nicrealtek_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = nicrealtek_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_NICNATSEMI == 1
{
.name = "nicnatsemi",
.init = nicnatsemi_init,
.shutdown = nicnatsemi_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = nicnatsemi_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = nicnatsemi_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_GFXNVIDIA == 1
{
.name = "gfxnvidia",
.init = gfxnvidia_init,
.shutdown = gfxnvidia_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = gfxnvidia_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = gfxnvidia_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_DRKAISER == 1
{
.name = "drkaiser",
.init = drkaiser_init,
.shutdown = drkaiser_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = drkaiser_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = drkaiser_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_SATASII == 1
{
.name = "satasii",
.init = satasii_init,
.shutdown = satasii_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = satasii_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = satasii_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_ATAHPT == 1
{
.name = "atahpt",
.init = atahpt_init,
.shutdown = atahpt_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = atahpt_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = atahpt_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_INTERNAL == 1
#if defined(__i386__) || defined(__x86_64__)
{
.name = "it87spi",
.init = it87spi_init,
.shutdown = noop_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#endif
#if CONFIG_FT2232_SPI == 1
{
.name = "ft2232_spi",
.init = ft2232_spi_init,
.shutdown = noop_shutdown, /* Missing shutdown */
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_SERPROG == 1
{
.name = "serprog",
.init = serprog_init,
.shutdown = serprog_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = serprog_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = serprog_chip_readn,
.chip_writeb = serprog_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = serprog_delay,
},
#endif
#if CONFIG_BUSPIRATE_SPI == 1
{
.name = "buspirate_spi",
.init = buspirate_spi_init,
.shutdown = buspirate_spi_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_DEDIPROG == 1
{
.name = "dediprog",
.init = dediprog_init,
.shutdown = dediprog_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_RAYER_SPI == 1
{
.name = "rayer_spi",
.init = rayer_spi_init,
.shutdown = noop_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
#if CONFIG_NICINTEL_SPI == 1
{
.name = "nicintel_spi",
.init = nicintel_spi_init,
.shutdown = nicintel_spi_shutdown,
.map_flash_region = fallback_map,
.unmap_flash_region = fallback_unmap,
.chip_readb = noop_chip_readb,
.chip_readw = fallback_chip_readw,
.chip_readl = fallback_chip_readl,
.chip_readn = fallback_chip_readn,
.chip_writeb = noop_chip_writeb,
.chip_writew = fallback_chip_writew,
.chip_writel = fallback_chip_writel,
.chip_writen = fallback_chip_writen,
.delay = internal_delay,
},
#endif
{}, /* This entry corresponds to PROGRAMMER_INVALID. */
};
#define SHUTDOWN_MAXFN 4
static int shutdown_fn_count = 0;
struct shutdown_func_data {
void (*func) (void *data);
void *data;
} static shutdown_fn[SHUTDOWN_MAXFN];
/* Initialize to 0 to make sure nobody registers a shutdown function before
* programmer init.
*/
static int may_register_shutdown = 0;
/* Register a function to be executed on programmer shutdown.
* The advantage over atexit() is that you can supply a void pointer which will
* be used as parameter to the registered function upon programmer shutdown.
* This pointer can point to arbitrary data used by said function, e.g. undo
* information for GPIO settings etc. If unneeded, set data=NULL.
* Please note that the first (void *data) belongs to the function signature of
* the function passed as first parameter.
*/
int register_shutdown(void (*function) (void *data), void *data)
{
if (shutdown_fn_count >= SHUTDOWN_MAXFN) {
msg_perr("Tried to register more than %i shutdown functions.\n",
SHUTDOWN_MAXFN);
return 1;
}
if (!may_register_shutdown) {
msg_perr("Tried to register a shutdown function before "
"programmer init.\n");
return 1;
}
shutdown_fn[shutdown_fn_count].func = function;
shutdown_fn[shutdown_fn_count].data = data;
shutdown_fn_count++;
return 0;
}
int programmer_init(char *param)
{
int ret;
/* Initialize all programmer specific data. */
/* Default to unlimited decode sizes. */
max_rom_decode = (const struct decode_sizes) {
.parallel = 0xffffffff,
.lpc = 0xffffffff,
.fwh = 0xffffffff,
.spi = 0xffffffff
};
/* Default to Parallel/LPC/FWH flash devices. If a known host controller
* is found, the init routine sets the buses_supported bitfield.
*/
buses_supported = CHIP_BUSTYPE_NONSPI;
/* Default to top aligned flash at 4 GB. */
flashbase = 0;
/* Registering shutdown functions is now allowed. */
may_register_shutdown = 1;
/* Default to allowing writes. Broken programmers set this to 0. */
programmer_may_write = 1;
programmer_param = param;
msg_pdbg("Initializing %s programmer\n",
programmer_table[programmer].name);
ret = programmer_table[programmer].init();
if (programmer_param && strlen(programmer_param)) {
msg_perr("Unhandled programmer parameters: %s\n",
programmer_param);
/* Do not error out here, the init itself was successful. */
}
return ret;
}
int programmer_shutdown(void)
{
/* Registering shutdown functions is no longer allowed. */
may_register_shutdown = 0;
while (shutdown_fn_count > 0) {
int i = --shutdown_fn_count;
shutdown_fn[i].func(shutdown_fn[i].data);
}
return programmer_table[programmer].shutdown();
}
void *programmer_map_flash_region(const char *descr, unsigned long phys_addr,
size_t len)
{
return programmer_table[programmer].map_flash_region(descr,
phys_addr, len);
}
void programmer_unmap_flash_region(void *virt_addr, size_t len)
{
programmer_table[programmer].unmap_flash_region(virt_addr, len);
}
void chip_writeb(uint8_t val, chipaddr addr)
{
programmer_table[programmer].chip_writeb(val, addr);
}
void chip_writew(uint16_t val, chipaddr addr)
{
programmer_table[programmer].chip_writew(val, addr);
}
void chip_writel(uint32_t val, chipaddr addr)
{
programmer_table[programmer].chip_writel(val, addr);
}
void chip_writen(uint8_t *buf, chipaddr addr, size_t len)
{
programmer_table[programmer].chip_writen(buf, addr, len);
}
uint8_t chip_readb(const chipaddr addr)
{
return programmer_table[programmer].chip_readb(addr);
}
uint16_t chip_readw(const chipaddr addr)
{
return programmer_table[programmer].chip_readw(addr);
}
uint32_t chip_readl(const chipaddr addr)
{
return programmer_table[programmer].chip_readl(addr);
}
void chip_readn(uint8_t *buf, chipaddr addr, size_t len)
{
programmer_table[programmer].chip_readn(buf, addr, len);
}
void programmer_delay(int usecs)
{
programmer_table[programmer].delay(usecs);
}
void map_flash_registers(struct flashchip *flash)
{
size_t size = flash->total_size * 1024;
/* Flash registers live 4 MByte below the flash. */
/* FIXME: This is incorrect for nonstandard flashbase. */
flash->virtual_registers = (chipaddr)programmer_map_flash_region("flash chip registers", (0xFFFFFFFF - 0x400000 - size + 1), size);
}
int read_memmapped(struct flashchip *flash, uint8_t *buf, int start, int len)
{
chip_readn(buf, flash->virtual_memory + start, len);
return 0;
}
int min(int a, int b)
{
return (a < b) ? a : b;
}
int max(int a, int b)
{
return (a > b) ? a : b;
}
int bitcount(unsigned long a)
{
int i = 0;
for (; a != 0; a >>= 1)
if (a & 1)
i++;
return i;
}
char *strcat_realloc(char *dest, const char *src)
{
dest = realloc(dest, strlen(dest) + strlen(src) + 1);
if (!dest) {
msg_gerr("Out of memory!\n");
return NULL;
}
strcat(dest, src);
return dest;
}
/* This is a somewhat hacked function similar in some ways to strtok().
* It will look for needle with a subsequent '=' in haystack, return a copy of
* needle and remove everything from the first occurrence of needle to the next
* delimiter from haystack.
*/
char *extract_param(char **haystack, char *needle, char *delim)
{
char *param_pos, *opt_pos, *rest;
char *opt = NULL;
int optlen;
int needlelen;
needlelen = strlen(needle);
if (!needlelen) {
msg_gerr("%s: empty needle! Please report a bug at "
"[email protected]\n", __func__);
return NULL;
}
/* No programmer parameters given. */
if (*haystack == NULL)
return NULL;
param_pos = strstr(*haystack, needle);
do {
if (!param_pos)
return NULL;
/* Needle followed by '='? */
if (param_pos[needlelen] == '=') {
/* Beginning of the string? */
if (param_pos == *haystack)
break;
/* After a delimiter? */
if (strchr(delim, *(param_pos - 1)))
break;
}
/* Continue searching. */
param_pos++;
param_pos = strstr(param_pos, needle);
} while (1);
if (param_pos) {
/* Get the string after needle and '='. */
opt_pos = param_pos + needlelen + 1;
optlen = strcspn(opt_pos, delim);
/* Return an empty string if the parameter was empty. */
opt = malloc(optlen + 1);
if (!opt) {
msg_gerr("Out of memory!\n");
exit(1);
}
strncpy(opt, opt_pos, optlen);
opt[optlen] = '\0';
rest = opt_pos + optlen;
/* Skip all delimiters after the current parameter. */
rest += strspn(rest, delim);
memmove(param_pos, rest, strlen(rest) + 1);
/* We could shrink haystack, but the effort is not worth it. */
}
return opt;
}
char *extract_programmer_param(char *param_name)
{
return extract_param(&programmer_param, param_name, ",");
}
/* start is an offset to the base address of the flash chip */
int check_erased_range(struct flashchip *flash, int start, int len)
{
int ret;
uint8_t *cmpbuf = malloc(len);
if (!cmpbuf) {
msg_gerr("Could not allocate memory!\n");
exit(1);
}
memset(cmpbuf, 0xff, len);
ret = verify_range(flash, cmpbuf, start, len, "ERASE");
free(cmpbuf);
return ret;
}
/*
* @cmpbuf buffer to compare against, cmpbuf[0] is expected to match the
flash content at location start
* @start offset to the base address of the flash chip
* @len length of the verified area
* @message string to print in the "FAILED" message
* @return 0 for success, -1 for failure
*/
int verify_range(struct flashchip *flash, uint8_t *cmpbuf, int start, int len, char *message)
{
int i, j, starthere, lenhere, ret = 0;
int page_size = flash->page_size;
uint8_t *readbuf = malloc(page_size);
int failcount = 0;
if (!len)
goto out_free;
if (!flash->read) {
msg_cerr("ERROR: flashrom has no read function for this flash chip.\n");
return 1;
}
if (!readbuf) {
msg_gerr("Could not allocate memory!\n");
exit(1);
}
if (start + len > flash->total_size * 1024) {
msg_gerr("Error: %s called with start 0x%x + len 0x%x >"
" total_size 0x%x\n", __func__, start, len,
flash->total_size * 1024);
ret = -1;
goto out_free;
}
if (!message)
message = "VERIFY";
/* Warning: This loop has a very unusual condition and body.
* The loop needs to go through each page with at least one affected
* byte. The lowest page number is (start / page_size) since that
* division rounds down. The highest page number we want is the page
* where the last byte of the range lives. That last byte has the
* address (start + len - 1), thus the highest page number is
* (start + len - 1) / page_size. Since we want to include that last
* page as well, the loop condition uses <=.
*/
for (i = start / page_size; i <= (start + len - 1) / page_size; i++) {
/* Byte position of the first byte in the range in this page. */
starthere = max(start, i * page_size);
/* Length of bytes in the range in this page. */
lenhere = min(start + len, (i + 1) * page_size) - starthere;
ret = flash->read(flash, readbuf, starthere, lenhere);
if (ret) {
msg_gerr("Verification impossible because read failed "
"at 0x%x (len 0x%x)\n", starthere, lenhere);
break;
}
for (j = 0; j < lenhere; j++) {
if (cmpbuf[starthere - start + j] != readbuf[j]) {
/* Only print the first failure. */
if (!failcount++)
msg_cerr("%s FAILED at 0x%08x! "
"Expected=0x%02x, Read=0x%02x,",
message, starthere + j,
cmpbuf[starthere - start + j],
readbuf[j]);
}
}
}
if (failcount) {
msg_cerr(" failed byte count from 0x%08x-0x%08x: 0x%x\n",
start, start + len - 1, failcount);
ret = -1;
}
out_free:
free(readbuf);
return ret;
}
/*
* Check if the buffer @have can be programmed to the content of @want without
* erasing. This is only possible if all chunks of size @gran are either kept
* as-is or changed from an all-ones state to any other state.
* The following write granularities (enum @gran) are known:
* - 1 bit. Each bit can be cleared individually.
* - 1 byte. A byte can be written once. Further writes to an already written
* byte cause the contents to be either undefined or to stay unchanged.
* - 128 bytes. If less than 128 bytes are written, the rest will be
* erased. Each write to a 128-byte region will trigger an automatic erase
* before anything is written. Very uncommon behaviour and unsupported by
* this function.
* - 256 bytes. If less than 256 bytes are written, the contents of the
* unwritten bytes are undefined.
*
* @have buffer with current content
* @want buffer with desired content
* @len length of the verified area
* @gran write granularity (enum, not count)
* @return 0 if no erase is needed, 1 otherwise
*/
int need_erase(uint8_t *have, uint8_t *want, int len, enum write_granularity gran)
{
int result = 0;
int i, j, limit;
switch (gran) {
case write_gran_1bit:
for (i = 0; i < len; i++)
if ((have[i] & want[i]) != want[i]) {
result = 1;
break;
}
break;
case write_gran_1byte:
for (i = 0; i < len; i++)
if ((have[i] != want[i]) && (have[i] != 0xff)) {
result = 1;
break;
}
break;
case write_gran_256bytes:
for (j = 0; j < len / 256; j++) {
limit = min (256, len - j * 256);
/* Are 'have' and 'want' identical? */
if (!memcmp(have + j * 256, want + j * 256, limit))
continue;
/* have needs to be in erased state. */
for (i = 0; i < limit; i++)
if (have[i] != 0xff) {
result = 1;
break;
}
if (result)
break;
}
break;
}
return result;
}
/* This function generates various test patterns useful for testing controller
* and chip communication as well as chip behaviour.
*
* If a byte can be written multiple times, each time keeping 0-bits at 0
* and changing 1-bits to 0 if the new value for that bit is 0, the effect
* is essentially an AND operation. That's also the reason why this function
* provides the result of AND between various patterns.
*
* Below is a list of patterns (and their block length).
* Pattern 0 is 05 15 25 35 45 55 65 75 85 95 a5 b5 c5 d5 e5 f5 (16 Bytes)
* Pattern 1 is 0a 1a 2a 3a 4a 5a 6a 7a 8a 9a aa ba ca da ea fa (16 Bytes)
* Pattern 2 is 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f (16 Bytes)
* Pattern 3 is a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 aa ab ac ad ae af (16 Bytes)
* Pattern 4 is 00 10 20 30 40 50 60 70 80 90 a0 b0 c0 d0 e0 f0 (16 Bytes)
* Pattern 5 is 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f (16 Bytes)
* Pattern 6 is 00 (1 Byte)
* Pattern 7 is ff (1 Byte)
* Patterns 0-7 have a big-endian block number in the last 2 bytes of each 256
* byte block.
*
* Pattern 8 is 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11... (256 B)
* Pattern 9 is ff fe fd fc fb fa f9 f8 f7 f6 f5 f4 f3 f2 f1 f0 ef ee... (256 B)
* Pattern 10 is 00 00 00 01 00 02 00 03 00 04... (128 kB big-endian counter)
* Pattern 11 is ff ff ff fe ff fd ff fc ff fb... (128 kB big-endian downwards)
* Pattern 12 is 00 (1 Byte)
* Pattern 13 is ff (1 Byte)
* Patterns 8-13 have no block number.
*
* Patterns 0-3 are created to detect and efficiently diagnose communication
* slips like missed bits or bytes and their repetitive nature gives good visual
* cues to the person inspecting the results. In addition, the following holds:
* AND Pattern 0/1 == Pattern 4
* AND Pattern 2/3 == Pattern 5
* AND Pattern 0/1/2/3 == AND Pattern 4/5 == Pattern 6
* A weakness of pattern 0-5 is the inability to detect swaps/copies between
* any two 16-byte blocks except for the last 16-byte block in a 256-byte bloc.
* They work perfectly for detecting any swaps/aliasing of blocks >= 256 bytes.
* 0x5 and 0xa were picked because they are 0101 and 1010 binary.
* Patterns 8-9 are best for detecting swaps/aliasing of blocks < 256 bytes.
* Besides that, they provide for bit testing of the last two bytes of every
* 256 byte block which contains the block number for patterns 0-6.
* Patterns 10-11 are special purpose for detecting subblock aliasing with
* block sizes >256 bytes (some Dataflash chips etc.)
* AND Pattern 8/9 == Pattern 12
* AND Pattern 10/11 == Pattern 12
* Pattern 13 is the completely erased state.
* None of the patterns can detect aliasing at boundaries which are a multiple
* of 16 MBytes (but such chips do not exist anyway for Parallel/LPC/FWH/SPI).
*/
int generate_testpattern(uint8_t *buf, uint32_t size, int variant)
{
int i;
if (!buf) {
msg_gerr("Invalid buffer!\n");
return 1;
}
switch (variant) {
case 0:
for (i = 0; i < size; i++)
buf[i] = (i & 0xf) << 4 | 0x5;
break;
case 1:
for (i = 0; i < size; i++)
buf[i] = (i & 0xf) << 4 | 0xa;
break;
case 2:
for (i = 0; i < size; i++)
buf[i] = 0x50 | (i & 0xf);
break;
case 3:
for (i = 0; i < size; i++)
buf[i] = 0xa0 | (i & 0xf);
break;
case 4:
for (i = 0; i < size; i++)
buf[i] = (i & 0xf) << 4;
break;
case 5:
for (i = 0; i < size; i++)
buf[i] = i & 0xf;
break;
case 6:
memset(buf, 0x00, size);
break;
case 7:
memset(buf, 0xff, size);
break;
case 8:
for (i = 0; i < size; i++)
buf[i] = i & 0xff;
break;
case 9:
for (i = 0; i < size; i++)
buf[i] = ~(i & 0xff);
break;
case 10:
for (i = 0; i < size % 2; i++) {
buf[i * 2] = (i >> 8) & 0xff;
buf[i * 2 + 1] = i & 0xff;
}
if (size & 0x1)
buf[i * 2] = (i >> 8) & 0xff;
break;
case 11:
for (i = 0; i < size % 2; i++) {
buf[i * 2] = ~((i >> 8) & 0xff);
buf[i * 2 + 1] = ~(i & 0xff);
}
if (size & 0x1)
buf[i * 2] = ~((i >> 8) & 0xff);
break;
case 12:
memset(buf, 0x00, size);
break;
case 13:
memset(buf, 0xff, size);
break;
}
if ((variant >= 0) && (variant <= 7)) {
/* Write block number in the last two bytes of each 256-byte
* block, big endian for easier reading of the hexdump.
* Note that this wraps around for chips larger than 2^24 bytes
* (16 MB).
*/
for (i = 0; i < size / 256; i++) {
buf[i * 256 + 254] = (i >> 8) & 0xff;
buf[i * 256 + 255] = i & 0xff;
}
}
return 0;
}
int check_max_decode(enum chipbustype buses, uint32_t size)
{
int limitexceeded = 0;
if ((buses & CHIP_BUSTYPE_PARALLEL) &&
(max_rom_decode.parallel < size)) {
limitexceeded++;
msg_pdbg("Chip size %u kB is bigger than supported "
"size %u kB of chipset/board/programmer "
"for %s interface, "
"probe/read/erase/write may fail. ", size / 1024,
max_rom_decode.parallel / 1024, "Parallel");
}
if ((buses & CHIP_BUSTYPE_LPC) && (max_rom_decode.lpc < size)) {
limitexceeded++;